Mathway | Popular Problems

Popular Problems

Rank	Topic	Problem	Formatted Problem
4501	Solve by Substitution	7x+8y=-6 , 2x+8y=4	$7 x + 8 y = - 6$ , $2 x + 8 y = 4$
4502	Solve by Substitution	7x-3y=17 , 6x+y=11	$7 x - 3 y = 17$ , $6 x + y = 11$
4503	Solve by Substitution	7x-3y=9 , 4x+y=16	$7 x - 3 y = 9$ , $4 x + y = 16$
4504	Solve by Substitution	7x-6y=27 , -4+4y=-12	$7 x - 6 y = 27$ , $- 4 + 4 y = - 12$
4505	Solve by Substitution	7x-6y=-5 , -14+12y=10	$7 x - 6 y = - 5$ , $- 14 + 12 y = 10$
4506	Solve by Substitution	7x-6y=-5 , -14x-12y=10	$7 x - 6 y = - 5$ , $- 14 x - 12 y = 10$
4507	Solve by Substitution	7x-8y=24 , xy^2=1	$7 x - 8 y = 24$ , $x y^{2} = 1$
4508	Solve by Substitution	7x-y=26 , x+3y=10	$7 x - y = 26$ , $x + 3 y = 10$
4509	Solve by Substitution	7x-y=58 , x+8y=49	$7 x - y = 58$ , $x + 8 y = 49$
4510	Solve by Substitution	7y-5x=31 , x=4-2y	$7 y - 5 x = 31$ , $x = 4 - 2 y$
4511	Solve by Substitution	82000=10x+6y+4z , 47000=5x+6y+2z	$82000 = 10 x + 6 y + 4 z$ , $47000 = 5 x + 6 y + 2 z$
4512	Solve by Substitution	8x+2y=17 , -4x-y=9	$8 x + 2 y = 17$ , $- 4 x - y = 9$
4513	Solve by Substitution	8x+2y=48 , 2x-8y=-56	$8 x + 2 y = 48$ , $2 x - 8 y = - 56$
4514	Solve by Substitution	x+16y=9 , 5x+2y=10	$x + 16 y = 9$ , $5 x + 2 y = 10$
4515	Solve by Substitution	x+2y+2z=45000 , 0.10x+0.07y+0.075z=3660	$x + 2 y + 2 z = 45000$ , $0.1 x + 0.07 y + 0.075 z = 3660$
4516	Solve by Substitution	x+2y+3z=11 , 2x-y+z=2	$x + 2 y + 3 z = 11$ , $2 x - y + z = 2$
4517	Solve by Substitution	x+2y+3z=15 , 2x+3y+4=-3 , -x-4y-8z=-70	$x + 2 y + 3 z = 15$ , $2 x + 3 y + 4 = - 3$ , $- x - 4 y - 8 z = - 70$
4518	Solve by Substitution	x+2y+3z=15 , 2x+3y+4z=-4 , -x-2y-4z=-7	$x + 2 y + 3 z = 15$ , $2 x + 3 y + 4 z = - 4$ , $- x - 2 y - 4 z = - 7$
4519	Solve by Substitution	x+2y+3z=90 , 3+4z=36	$x + 2 y + 3 z = 90$ , $3 + 4 z = 36$
4520	Solve by Substitution	x+2y+4z=6 , x+y+2z=3	$x + 2 y + 4 z = 6$ , $x + y + 2 z = 3$
4521	Solve by Substitution	x+2y+5z=15 , 2x-3y+3z=2	$x + 2 y + 5 z = 15$ , $2 x - 3 y + 3 z = 2$
4522	Solve by Substitution	x+2y+5z=16 , 2x-3y+3z=4	$x + 2 y + 5 z = 16$ , $2 x - 3 y + 3 z = 4$
4523	Solve by Substitution	x+2y+z=5 , 2x+y-3z=-2 , 3x+y+4z=-5	$x + 2 y + z = 5$ , $2 x + y - 3 z = - 2$ , $3 x + y + 4 z = - 5$
4524	Solve by Substitution	x+2y+z=72 , 2x+y+z=66 , 3x+y+2z=102 , c-60x-48y-42z=0	$x + 2 y + z = 72$ , $2 x + y + z = 66$ , $3 x + y + 2 z = 102$ , $c - 60 x - 48 y - 42 z = 0$
4525	Solve by Substitution	x+2y=-1 , 4x+3y=-9	$x + 2 y = - 1$ , $4 x + 3 y = - 9$
4526	Solve by Substitution	x+2y=10 , x-y=5	$x + 2 y = 10$ , $x - y = 5$
4527	Solve by Substitution	x+2y=11 , -x+2y=5	$x + 2 y = 11$ , $- x + 2 y = 5$
4528	Solve by Substitution	x+2y=2 , 2x+3y=1 , 3x+4y=0 , 4x+5y=-1	$x + 2 y = 2$ , $2 x + 3 y = 1$ , $3 x + 4 y = 0$ , $4 x + 5 y = - 1$
4529	Solve by Substitution	-x+2y=2 , x-2y=2	$- x + 2 y = 2$ , $x - 2 y = 2$
4530	Solve by Substitution	x+2y=4 , 8x+16y=32	$x + 2 y = 4$ , $8 x + 16 y = 32$
4531	Solve by Substitution	x+2y=4 , -x+y=-1	$x + 2 y = 4$ , $- x + y = - 1$
4532	Solve by Substitution	x+2y=4 , 3x+4y=10	$x + 2 y = 4$ , $3 x + 4 y = 10$
4533	Solve by Substitution	x+2y=5 , 2x+6y=9	$x + 2 y = 5$ , $2 x + 6 y = 9$
4534	Solve by Substitution	x+2y=6 , 4x+8y=24	$x + 2 y = 6$ , $4 x + 8 y = 24$
4535	Solve by Substitution	x+2y=-6 , x+2y=6	$x + 2 y = - 6$ , $x + 2 y = 6$
4536	Solve by Substitution	x+2y=7 , 3x+5y=17	$x + 2 y = 7$ , $3 x + 5 y = 17$
4537	Solve by Substitution	x+2y=8 , 1/2x+1/2y=3	$x + 2 y = 8$ , $\frac{1}{2} x + \frac{1}{2} y = 3$
4538	Solve by Substitution	x+2y=8 , 2x+6y=9	$x + 2 y = 8$ , $2 x + 6 y = 9$
4539	Solve by Substitution	x+2y=8 , 3x+4y=18	$x + 2 y = 8$ , $3 x + 4 y = 18$
4540	Solve by Substitution	x+2y=8 , -3x+6y=18	$x + 2 y = 8$ , $- 3 x + 6 y = 18$
4541	Solve by Substitution	x+2y=9 , -7x-7y=-35	$x + 2 y = 9$ , $- 7 x - 7 y = - 35$
4542	Solve by Substitution	x+2y-z=4 , 2x+y+z=-2 , x+2y+z=2	$x + 2 y - z = 4$ , $2 x + y + z = - 2$ , $x + 2 y + z = 2$
4543	Solve by Substitution	x+3y+3z=3 , x+2y+3z=5 , x+3y+2z=5	$x + 3 y + 3 z = 3$ , $x + 2 y + 3 z = 5$ , $x + 3 y + 2 z = 5$
4544	Solve by Substitution	x+3y+4z=16 , 2x-y+z=4	$x + 3 y + 4 z = 16$ , $2 x - y + z = 4$
4545	Solve by Substitution	x+3y+5z=38 , -x+y+2z=3 , x+y-2z=7	$x + 3 y + 5 z = 38$ , $- x + y + 2 z = 3$ , $x + y - 2 z = 7$
4546	Solve by Substitution	2x-7y=12 , 2x+2y=3	$2 x - 7 y = 12$ , $2 x + 2 y = 3$
4547	Solve by Substitution	2x-7y=-14 , 2x+2y=13	$2 x - 7 y = - 14$ , $2 x + 2 y = 13$
4548	Solve by Substitution	2x-8y=4 , 3x-4y=4	$2 x - 8 y = 4$ , $3 x - 4 y = 4$
4549	Solve by Substitution	2xy+1=0 , x+36y=3	$2 x y + 1 = 0$ , $x + 36 y = 3$
4550	Solve by Substitution	2x-y+3z=15 , 4x+y-z=-7 , -3x+4y+5z=8	$2 x - y + 3 z = 15$ , $4 x + y - z = - 7$ , $- 3 x + 4 y + 5 z = 8$
4551	Solve by Substitution	2x-y=-1 , 2x+y=-3	$2 x - y = - 1$ , $2 x + y = - 3$
4552	Solve by Substitution	-2x-y=1 , 4x+2y=-2 , -8x-4y=4	$- 2 x - y = 1$ , $4 x + 2 y = - 2$ , $- 8 x - 4 y = 4$
4553	Solve by Substitution	2x-y=-2 , -2x+y-2=0	$2 x - y = - 2$ , $- 2 x + y - 2 = 0$
4554	Solve by Substitution	2x-y=2 , -2x-y=6	$2 x - y = 2$ , $- 2 x - y = 6$
4555	Solve by Substitution	2x-y=2 , 3x+4y=6	$2 x - y = 2$ , $3 x + 4 y = 6$
4556	Solve by Substitution	2x-y=2 , 5x+6y=8	$2 x - y = 2$ , $5 x + 6 y = 8$
4557	Solve by Substitution	2x-y=-2 , x=y-3	$2 x - y = - 2$ , $x = y - 3$
4558	Solve by Substitution	2x-y=4 , 6x+ky=3	$2 x - y = 4$ , $6 x + k y = 3$
4559	Solve by Substitution	2x-y=5 , 3x+5=27	$2 x - y = 5$ , $3 x + 5 = 27$
4560	Solve by Substitution	2x-y=5 , 3x+5y=27	$2 x - y = 5$ , $3 x + 5 y = 27$
4561	Solve by Substitution	2x-y=5 , 6x+ky=2	$2 x - y = 5$ , $6 x + k y = 2$
4562	Solve by Substitution	2x-y=6 , x+2y=8 , 2x+3y=14	$2 x - y = 6$ , $x + 2 y = 8$ , $2 x + 3 y = 14$
4563	Solve by Substitution	2x-y=9 , 2x=-8	$2 x - y = 9$ , $2 x = - 8$
4564	Solve by Substitution	2y=x+8 , x-2y=-8	$2 y = x + 8$ , $x - 2 y = - 8$
4565	Solve by Substitution	2y-3x=2 , 4y=6x+4	$2 y - 3 x = 2$ , $4 y = 6 x + 4$
4566	Solve by Substitution	3x^2+3y^2=30 , 9x^2+9y^2=60	$3 x^{2} + 3 y^{2} = 30$ , $9 x^{2} + 9 y^{2} = 60$
4567	Solve by Substitution	3x^2-2y^2+5=0 , 2x^2-y^2+2=0	$3 x^{2} - 2 y^{2} + 5 = 0$ , $2 x^{2} - y^{2} + 2 = 0$
4568	Solve by Substitution	3000x+500y=51000 , 10000x+2000y=180000	$3000 x + 500 y = 51000$ , $10000 x + 2000 y = 180000$
4569	Solve by Substitution	30r+20p=17.40 , 20r+12p=11.04 , 10r+50p=x	$30 r + 20 p = 17.4$ , $20 r + 12 p = 11.04$ , $10 r + 50 p = x$
4570	Solve by Substitution	30r+20p=26.40 , 20r+12p=17.04	$30 r + 20 p = 26.4$ , $20 r + 12 p = 17.04$
4571	Solve by Substitution	30x+10y=1.1102230246252-15 , 100x+80y=-28	$30 x + 10 y = 1.11022302 - 15$ , $100 x + 80 y = - 28$
4572	Solve by Substitution	30x+20y=440 , 10x+25y=300	$30 x + 20 y = 440$ , $10 x + 25 y = 300$
4573	Solve by Substitution	30x+70y=16000 , 45x+210y=34500	$30 x + 70 y = 16000$ , $45 x + 210 y = 34500$
4574	Solve by Substitution	32x+24y=640 , 240x+100y=3200	$32 x + 24 y = 640$ , $240 x + 100 y = 3200$
4575	Solve by Substitution	35x+70y+175d+70w=2240 , 40x+40y+80d+70w=1120 , 40x+30y+70d+10w=920 , w=1	$35 x + 70 y + 175 d + 70 w = 2240$ , $40 x + 40 y + 80 d + 70 w = 1120$ , $40 x + 30 y + 70 d + 10 w = 920$ , $w = 1$
4576	Solve by Substitution	360x+90y=720 , 15x+40y=120	$360 x + 90 y = 720$ , $15 x + 40 y = 120$
4577	Solve by Substitution	39=3*13 , 39=(a+b)(a-b)	$39 = 3 \cdot 13$ , $39 = (a + b) (a - b)$
4578	Solve by Substitution	-3a-3y=3 , y=-5a-17	$- 3 a - 3 y = 3$ , $y = - 5 a - 17$
4579	Solve by Substitution	3m+3n=-1 , 2m+5n=3	$3 m + 3 n = - 1$ , $2 m + 5 n = 3$
4580	Solve by Substitution	3m+n=6 , 2m-n=-6	$3 m + n = 6$ , $2 m - n = - 6$
4581	Solve by Substitution	3m-n=5 , 2m+5n=7	$3 m - n = 5$ , $2 m + 5 n = 7$
4582	Solve by Substitution	3x1+2x2+3x3=5 , -5x1-5x2-4x3=-3 , 3x1-x2-2x*3=1	$3 x \cdot 1 + 2 x \cdot 2 + 3 x \cdot 3 = 5$ , $- 5 x \cdot 1 - 5 x \cdot 2 - 4 x \cdot 3 = - 3$ , $3 x \cdot 1 - x \cdot 2 - 2 x \cdot 3 = 1$
4583	Solve by Substitution	-3x1+x2=6 , -2x1+x2=3	$- 3 x \cdot 1 + x \cdot 2 = 6$ , $- 2 x \cdot 1 + x \cdot 2 = 3$
4584	Solve by Substitution	3x+11y=6 , 4x-11y=8	$3 x + 11 y = 6$ , $4 x - 11 y = 8$
4585	Solve by Substitution	3x+2y+2z=4 , -6x+4y-2z=-9 , 9x-2y+2z=10	$3 x + 2 y + 2 z = 4$ , $- 6 x + 4 y - 2 z = - 9$ , $9 x - 2 y + 2 z = 10$
4586	Solve by Substitution	3x+2y+6z=2 , x+y+2z=1 , 2x+2y+5z=3	$3 x + 2 y + 6 z = 2$ , $x + y + 2 z = 1$ , $2 x + 2 y + 5 z = 3$
4587	Solve by Substitution	3x+2y=1 , 2x-10=4	$3 x + 2 y = 1$ , $2 x - 10 = 4$
4588	Solve by Substitution	-3x+2y=10 , 4x-y=10	$- 3 x + 2 y = 10$ , $4 x - y = 10$
4589	Solve by Substitution	3x+2y=11 , x+5y=21	$3 x + 2 y = 11$ , $x + 5 y = 21$
4590	Solve by Substitution	3x+2y=14 , x-4y=-14	$3 x + 2 y = 14$ , $x - 4 y = - 14$
4591	Solve by Substitution	3x+2y=25 , 6x-y=40	$3 x + 2 y = 25$ , $6 x - y = 40$
4592	Solve by Substitution	3x+2y=4 , 2x+y=1	$3 x + 2 y = 4$ , $2 x + y = 1$
4593	Solve by Substitution	3x+2y=4 , x=20-3y	$3 x + 2 y = 4$ , $x = 20 - 3 y$
4594	Solve by Substitution	3x+2y=5 , 9x+6y=9	$3 x + 2 y = 5$ , $9 x + 6 y = 9$
4595	Solve by Substitution	3x+2y=6 , 3x+3=y	$3 x + 2 y = 6$ , $3 x + 3 = y$
4596	Solve by Substitution	3x+2y=7 , 9x+6y=9	$3 x + 2 y = 7$ , $9 x + 6 y = 9$
4597	Solve by Substitution	3x+2y-1z=2 , 2x-3y+1z=-2 , 1x-1y-z=-4	$3 x + 2 y - 1 z = 2$ , $2 x - 3 y + 1 z = - 2$ , $1 x - 1 y - z = - 4$
4598	Solve by Substitution	3x+3y+z=22 , x+z=6 , 4y-3z=8	$3 x + 3 y + z = 22$ , $x + z = 6$ , $4 y - 3 z = 8$
4599	Solve by Substitution	3x+3y+z=22 , x+x=6 , 4y-3z=8	$3 x + 3 y + z = 22$ , $x + x = 6$ , $4 y - 3 z = 8$
4600	Solve by Substitution	3x+3y+z=3 , x-3y+2z=-16 , 8x-2y+3z=-23	$3 x + 3 y + z = 3$ , $x - 3 y + 2 z = - 16$ , $8 x - 2 y + 3 z = - 23$