Mathway | Popular Problems

Popular Problems

Rank	Topic	Problem	Formatted Problem
4601	Solve by Substitution	3x+3y=21 , 4x+2y=18	$3 x + 3 y = 21$ , $4 x + 2 y = 18$
4602	Solve by Substitution	3x+3y=6 , 4x-3y=15	$3 x + 3 y = 6$ , $4 x - 3 y = 15$
4603	Solve by Substitution	3x+4=-y , 2x+y=0	$3 x + 4 = - y$ , $2 x + y = 0$
4604	Solve by Substitution	3x+4y=16 , -5y+y=27	$3 x + 4 y = 16$ , $- 5 y + y = 27$
4605	Solve by Substitution	3x+4y=3 , 3x-4y=3	$3 x + 4 y = 3$ , $3 x - 4 y = 3$
4606	Solve by Substitution	3x+4y=-5 , 9x-2y=13	$3 x + 4 y = - 5$ , $9 x - 2 y = 13$
4607	Solve by Substitution	3x+4y=5 , x=3y-7	$3 x + 4 y = 5$ , $x = 3 y - 7$
4608	Solve by Substitution	3x+4y=-6 , x-5y=2	$3 x + 4 y = - 6$ , $x - 5 y = 2$
4609	Solve by Substitution	3x+4y=9 , 2x-y=-7	$3 x + 4 y = 9$ , $2 x - y = - 7$
4610	Solve by Substitution	3x+5y=0 , 2x-3y=19	$3 x + 5 y = 0$ , $2 x - 3 y = 19$
4611	Solve by Substitution	-3x+5y=-11 , x=3y+5	$- 3 x + 5 y = - 11$ , $x = 3 y + 5$
4612	Solve by Substitution	3x+5y=13 , 5x+2y=-9	$3 x + 5 y = 13$ , $5 x + 2 y = - 9$
4613	Solve by Substitution	3x+8y=12 , 8x-5y=12	$3 x + 8 y = 12$ , $8 x - 5 y = 12$
4614	Solve by Substitution	3x+8y=-7 , 5x-8y=8	$3 x + 8 y = - 7$ , $5 x - 8 y = 8$
4615	Solve by Substitution	3x+9y=12 , 5x+15y=20	$3 x + 9 y = 12$ , $5 x + 15 y = 20$
4616	Solve by Substitution	3x+9y=-30 , 5x-y=4	$3 x + 9 y = - 30$ , $5 x - y = 4$
4617	Solve by Substitution	3x+y=1 , (2k-1)x+(k-1)y=2k+1	$3 x + y = 1$ , $(2 k - 1) x + (k - 1) y = 2 k + 1$
4618	Solve by Substitution	3x+y=10 , x-5y=14	$3 x + y = 10$ , $x - 5 y = 14$
4619	Solve by Substitution	-3x+y=15 , 2x+2y=-2	$- 3 x + y = 15$ , $2 x + 2 y = - 2$
4620	Solve by Substitution	3x+y=-2 , 2x^2-y=0	$3 x + y = - 2$ , $2 x^{2} - y = 0$
4621	Solve by Substitution	3x+y=5 , -9x-3y=23	$3 x + y = 5$ , $- 9 x - 3 y = 23$
4622	Solve by Substitution	3x+y=7 , x-y=2	$3 x + y = 7$ , $x - y = 2$
4623	Solve by Substitution	3x+y=8 , -6x-2y=18	$3 x + y = 8$ , $- 6 x - 2 y = 18$
4624	Solve by Substitution	-3x+y=-9 , 3x=9+y	$- 3 x + y = - 9$ , $3 x = 9 + y$
4625	Solve by Substitution	3x+y-z=0 , 2x-y+3z=-7	$3 x + y - z = 0$ , $2 x - y + 3 z = - 7$
4626	Solve by Substitution	3x=y-4 , 3x-y=5	$3 x = y - 4$ , $3 x - y = 5$
4627	Solve by Substitution	3x-2y+3z-v=15 , 2x+3y+u=20 , x-y+3z=15 , 2x+2y-z+4u=12	$3 x - 2 y + 3 z - v = 15$ , $2 x + 3 y + u = 20$ , $x - y + 3 z = 15$ , $2 x + 2 y - z + 4 u = 12$
4628	Solve by Substitution	3x-2y+4z=9 , -6x+4y-8z=k	$3 x - 2 y + 4 z = 9$ , $- 6 x + 4 y - 8 z = k$
4629	Solve by Substitution	3x-2y=0 , 9x-y=15	$3 x - 2 y = 0$ , $9 x - y = 15$
4630	Solve by Substitution	3x-2y=1 , -9x-6y=-3	$3 x - 2 y = 1$ , $- 9 x - 6 y = - 3$
4631	Solve by Substitution	3x-2y=11 , 8x-4y=48	$3 x - 2 y = 11$ , $8 x - 4 y = 48$
4632	Solve by Substitution	3x-y=0 , 6x+7y=1	$3 x - y = 0$ , $6 x + 7 y = 1$
4633	Solve by Substitution	3x-y=1 , x+2y=-9	$3 x - y = 1$ , $x + 2 y = - 9$
4634	Solve by Substitution	3x-y=1 , x+6y=51	$3 x - y = 1$ , $x + 6 y = 51$
4635	Solve by Substitution	3x-y=-15 , 2*x=-19	$3 x - y = - 15$ , $2 \cdot x = - 19$
4636	Solve by Substitution	3x-y=-15 , 2*y=-19	$3 x - y = - 15$ , $2 \cdot y = - 19$
4637	Solve by Substitution	3x-y=17 , 5x-7y=7	$3 x - y = 17$ , $5 x - 7 y = 7$
4638	Solve by Substitution	3x-y=2 , x+2y=3	$3 x - y = 2$ , $x + 2 y = 3$
4639	Solve by Substitution	3x-y=3 , 2x+y=2	$3 x - y = 3$ , $2 x + y = 2$
4640	Solve by Substitution	3x-y=6 , 5x+2y=32	$3 x - y = 6$ , $5 x + 2 y = 32$
4641	Solve by Substitution	3x-y=7 , 2x+3y=1	$3 x - y = 7$ , $2 x + 3 y = 1$
4642	Solve by Substitution	3y+3x=4 , 3y=6-2x	$3 y + 3 x = 4$ , $3 y = 6 - 2 x$
4643	Solve by Substitution	3y=2x-8 , 5x+3y=1	$3 y = 2 x - 8$ , $5 x + 3 y = 1$
4644	Solve by Substitution	3y=6 , 2x+y=10	$3 y = 6$ , $2 x + y = 10$
4645	Solve by Substitution	-3y=x-5 , x+5y=7	$- 3 y = x - 5$ , $x + 5 y = 7$
4646	Solve by Substitution	3y-2x=0 , y+8x=52	$3 y - 2 x = 0$ , $y + 8 x = 52$
4647	Solve by Substitution	3y-2x=1 , 6y=4x+2	$3 y - 2 x = 1$ , $6 y = 4 x + 2$
4648	Solve by Substitution	3y-2y+4z=11 , 2x-4y+5z=4 , x+2y-z=10	$3 y - 2 y + 4 z = 11$ , $2 x - 4 y + 5 z = 4$ , $x + 2 y - z = 10$
4649	Solve by Substitution	3y-3x=2 , 6y=6x+4	$3 y - 3 x = 2$ , $6 y = 6 x + 4$
4650	Solve by Substitution	40a+60b=32000 , 1.5a+2b=60000	$40 a + 60 b = 32000$ , $1.5 a + 2 b = 60000$
4651	Solve by Substitution	43500x-y=1295000 , 27000x-y=440000	$43500 x - y = 1295000$ , $27000 x - y = 440000$
4652	Solve by Substitution	49=a((10-1)d) , 19=a((4-1)d)	$49 = a \cdot ((10 - 1) d)$ , $19 = a \cdot ((4 - 1) d)$
4653	Solve by Substitution	4x1-x2=7 , x1+2x2=4	$4 x \cdot 1 - x \cdot 2 = 7$ , $x \cdot 1 + 2 x \cdot 2 = 4$
4654	Solve by Substitution	4x+10y=20 , 2x-3y=-6	$4 x + 10 y = 20$ , $2 x - 3 y = - 6$
4655	Solve by Substitution	4x+12y=12 , 5x+15y=15	$4 x + 12 y = 12$ , $5 x + 15 y = 15$
4656	Solve by Substitution	4x+14y=15 , 6x+21y=26	$4 x + 14 y = 15$ , $6 x + 21 y = 26$
4657	Solve by Substitution	4x+2y=2 , 4x-2y=14	$4 x + 2 y = 2$ , $4 x - 2 y = 14$
4658	Solve by Substitution	4x+2y=20 , 9x+9y=36	$4 x + 2 y = 20$ , $9 x + 9 y = 36$
4659	Solve by Substitution	4x+3y=0 , x-5y=0	$4 x + 3 y = 0$ , $x - 5 y = 0$
4660	Solve by Substitution	4x+3y=1 , 2x-5y=12	$4 x + 3 y = 1$ , $2 x - 5 y = 12$
4661	Solve by Substitution	4x+3y=15 , 8x+6y=-4	$4 x + 3 y = 15$ , $8 x + 6 y = - 4$
4662	Solve by Substitution	4x+3y=21 , 4x+8y=32	$4 x + 3 y = 21$ , $4 x + 8 y = 32$
4663	Solve by Substitution	4x+3y=24 , 3x+4y=8	$4 x + 3 y = 24$ , $3 x + 4 y = 8$
4664	Solve by Substitution	4x+3y=26 , 3x-11y=-7	$4 x + 3 y = 26$ , $3 x - 11 y = - 7$
4665	Solve by Substitution	4x+3y=4 , x+5y=18	$4 x + 3 y = 4$ , $x + 5 y = 18$
4666	Solve by Substitution	4x+3y=5 , 8x+6y=8	$4 x + 3 y = 5$ , $8 x + 6 y = 8$
4667	Solve by Substitution	4x+3y=7 , 12x+9y=9	$4 x + 3 y = 7$ , $12 x + 9 y = 9$
4668	Solve by Substitution	4x+3y=9 , 12x+9y=9	$4 x + 3 y = 9$ , $12 x + 9 y = 9$
4669	Solve by Substitution	4x+3y=-9 , 2x-3y=-16	$4 x + 3 y = - 9$ , $2 x - 3 y = - 16$
4670	Solve by Substitution	4x+3y=9 , 8x+6y=6	$4 x + 3 y = 9$ , $8 x + 6 y = 6$
4671	Solve by Substitution	4x+4y=8 , 2x-4y=4	$4 x + 4 y = 8$ , $2 x - 4 y = 4$
4672	Solve by Substitution	4x+5y=11 , 12x+15y=33	$4 x + 5 y = 11$ , $12 x + 15 y = 33$
4673	Solve by Substitution	4x+5y=18 , 3x-9y=-12	$4 x + 5 y = 18$ , $3 x - 9 y = - 12$
4674	Solve by Substitution	4x+5y=-19 , 3x-3y=6	$4 x + 5 y = - 19$ , $3 x - 3 y = 6$
4675	Solve by Substitution	3x-2y=14 , 2x+3y=5	$3 x - 2 y = 14$ , $2 x + 3 y = 5$
4676	Solve by Substitution	3x-2y=19 , 4x+7y=6	$3 x - 2 y = 19$ , $4 x + 7 y = 6$
4677	Solve by Substitution	3x-2y=23 , 5x+7y=28	$3 x - 2 y = 23$ , $5 x + 7 y = 28$
4678	Solve by Substitution	3x-2y=-3 , 2x+y=3 , x-2y=-5	$3 x - 2 y = - 3$ , $2 x + y = 3$ , $x - 2 y = - 5$
4679	Solve by Substitution	3x-2y=3 , 7x-5y=0	$3 x - 2 y = 3$ , $7 x - 5 y = 0$
4680	Solve by Substitution	3x-2y=32 , 5x+7y=12	$3 x - 2 y = 32$ , $5 x + 7 y = 12$
4681	Solve by Substitution	3x-2y=4 , 2x+y=-1	$3 x - 2 y = 4$ , $2 x + y = - 1$
4682	Solve by Substitution	3x-2y=4 , 3x+9y=6	$3 x - 2 y = 4$ , $3 x + 9 y = 6$
4683	Solve by Substitution	3x-2y=4 , 6x-4y=16	$3 x - 2 y = 4$ , $6 x - 4 y = 16$
4684	Solve by Substitution	3x-2y=4 , 6x-4y=8	$3 x - 2 y = 4$ , $6 x - 4 y = 8$
4685	Solve by Substitution	3x-2y=5 , 3y+8z=1 , 5x-2z=4	$3 x - 2 y = 5$ , $3 y + 8 z = 1$ , $5 x - 2 z = 4$
4686	Solve by Substitution	3x-2y=5 , 4x+3y=-2	$3 x - 2 y = 5$ , $4 x + 3 y = - 2$
4687	Solve by Substitution	3x-2y=-5 , -6x+4y=10	$3 x - 2 y = - 5$ , $- 6 x + 4 y = 10$
4688	Solve by Substitution	3x-2y=5 , -6x+4y=-10	$3 x - 2 y = 5$ , $- 6 x + 4 y = - 10$
4689	Solve by Substitution	3x-2y=5 , 6x-4y=-6	$3 x - 2 y = 5$ , $6 x - 4 y = - 6$
4690	Solve by Substitution	3x-2y=8 , 2x+5y=-1	$3 x - 2 y = 8$ , $2 x + 5 y = - 1$
4691	Solve by Substitution	x+2y+z=-2 , -2x-3y-z=-1 , 5x+10y+5z=-10	$x + 2 y + z = - 2$ , $- 2 x - 3 y - z = - 1$ , $5 x + 10 y + 5 z = - 10$
4692	Solve by Substitution	x+2y=12 , y=0	$x + 2 y = 12$ , $y = 0$
4693	Solve by Substitution	x+2y=21 , 6x+y=24	$x + 2 y = 21$ , $6 x + y = 24$
4694	Solve by Substitution	x+2y=35 , 5x+y=40	$x + 2 y = 35$ , $5 x + y = 40$
4695	Solve by Substitution	x+2y-z=0 , 3x-y+z=6 , -2x-4y+2x=0	$x + 2 y - z = 0$ , $3 x - y + z = 6$ , $- 2 x - 4 y + 2 x = 0$
4696	Find the Cofactor Matrix	[[555555,5,55,5],[5,5,5,5],[5,5,5,5],[5,5,5,5]]	$[\begin{array}{c} 555555 & 5 & 55 & 5 \\ 5 & 5 & 5 & 5 \\ 5 & 5 & 5 & 5 \\ 5 & 5 & 5 & 5 \end{array}]$
4697	Solve by Substitution	x+3y=15 , 2x-y=14	$x + 3 y = 15$ , $2 x - y = 14$
4698	Solve by Substitution	-x+3y=3 , x+y=4 , y=0	$- x + 3 y = 3$ , $x + y = 4$ , $y = 0$
4699	Solve by Substitution	2x-1x-5x=12 , 1x-3x=11	$2 x - 1 x - 5 x = 12$ , $1 x - 3 x = 11$
4700	Solve by Substitution	2x-3y=1.25 , -4x+5y=-3.75	$2 x - 3 y = 1.25$ , $- 4 x + 5 y = - 3.75$