Mathway | Popular Problems

Popular Problems

Rank	Topic	Problem	Formatted Problem
4801	Solve by Substitution	6y+2x=3 , 6y=7-x	$6 y + 2 x = 3$ , $6 y = 7 - x$
4802	Solve by Substitution	6y-4=-x , 2x+10y=5	$6 y - 4 = - x$ , $2 x + 10 y = 5$
4803	Solve by Substitution	7(8)=8(8-1) , 7(8)+7(64)=8(64-1) , 7(8)+7(64)+7(512)=8(512-1) , 7(8)+7(64)+7(512)+7(4096)=8(4096-1)	$7 (8) = 8 (8 - 1)$ , $7 (8) + 7 (64) = 8 (64 - 1)$ , $7 (8) + 7 (64) + 7 (512) = 8 (512 - 1)$ , $7 (8) + 7 (64) + 7 (512) + 7 (4096) = 8 (4096 - 1)$
4804	Solve by Substitution	7m+10n=95 , 3m+8n=50	$7 m + 10 n = 95$ , $3 m + 8 n = 50$
4805	Solve by Substitution	7x+13y=-5 , 5x+4y=23	$7 x + 13 y = - 5$ , $5 x + 4 y = 23$
4806	Solve by Substitution	7x+2y=24 , x+2y=0	$7 x + 2 y = 24$ , $x + 2 y = 0$
4807	Solve by Substitution	7x+3y+5z=0 , 3x+y+2z=0	$7 x + 3 y + 5 z = 0$ , $3 x + y + 2 z = 0$
4808	Solve by Substitution	7x+3y+5z=-13 , 3x+y+2z=17	$7 x + 3 y + 5 z = - 13$ , $3 x + y + 2 z = 17$
4809	Solve by Substitution	7x+5y=3 , 2x+3y=-7	$7 x + 5 y = 3$ , $2 x + 3 y = - 7$
4810	Solve by Substitution	7x+5y=32 , -3x+y=20	$7 x + 5 y = 32$ , $- 3 x + y = 20$
4811	Solve by Substitution	3x-4y=12 , x+2y=4	$3 x - 4 y = 12$ , $x + 2 y = 4$
4812	Solve by Substitution	-3x-4y=2 , 8y=6x-4	$- 3 x - 4 y = 2$ , $8 y = 6 x - 4$
4813	Solve by Substitution	3x-6y=-15 , x-2y=-5	$3 x - 6 y = - 15$ , $x - 2 y = - 5$
4814	Solve by Substitution	3x-6y=-9 , -2x+4y=12	$3 x - 6 y = - 9$ , $- 2 x + 4 y = 12$
4815	Solve by Substitution	3x-7y=-1 , 2x+y=5	$3 x - 7 y = - 1$ , $2 x + y = 5$
4816	Solve by Substitution	3x-8y=5 , 4x-4y=5	$3 x - 8 y = 5$ , $4 x - 4 y = 5$
4817	Solve by Substitution	3x-9y+0z=1 , 3x+9y-9z=3 , 2x+0y+5z=0	$3 x - 9 y + 0 z = 1$ , $3 x + 9 y - 9 z = 3$ , $2 x + 0 y + 5 z = 0$
4818	Solve by Substitution	5/7x+2/7y=4 , 6x+y=35	$\frac{5}{7} x + \frac{2}{7} y = 4$ , $6 x + y = 35$
4819	Solve by Substitution	7/2x+3/2y=0 , 1/3x-20/7y=4	$\frac{7}{2} x + \frac{3}{2} y = 0$ , $\frac{1}{3} x - \frac{20}{7} y = 4$
4820	Solve by Substitution	7/4x-5/2=2 , 1/4x+7/2=8	$\frac{7}{4} x - \frac{5}{2} = 2$ , $\frac{1}{4} x + \frac{7}{2} = 8$
4821	Solve by Substitution	7/4x-5/2y=2 , 1/4x+7/2y=2	$\frac{7}{4} x - \frac{5}{2} y = 2$ , $\frac{1}{4} x + \frac{7}{2} y = 2$
4822	Solve by Substitution	a^3+b=20 , a^2+2b+1=a	$a^{3} + b = 20$ , $a^{2} + 2 b + 1 = a$
4823	Solve by Substitution	x/2-y/2=-1 , x+3y=-10	$\frac{x}{2} - \frac{y}{2} = - 1$ , $x + 3 y = - 10$
4824	Solve by Substitution	x/2+y/2=6 , x-y=-2	$\frac{x}{2} + \frac{y}{2} = 6$ , $x - y = - 2$
4825	Solve by Substitution	x/2+y/3=8 , (2x)/3+(3y)/2=17	$\frac{x}{2} + \frac{y}{3} = 8$ , $\frac{2 x}{3} + \frac{3 y}{2} = 17$
4826	Solve by Substitution	x/5+y=6/5 , x/10+y/3=5/6	$\frac{x}{5} + y = \frac{6}{5}$ , $\frac{x}{10} + \frac{y}{3} = \frac{5}{6}$
4827	Solve by Substitution	x+2x^2+3x^3-x^4=0 , x-x^3-x^4=2 , 3x-x^4=4	$x + 2 x^{2} + 3 x^{3} - x^{4} = 0$ , $x - x^{3} - x^{4} = 2$ , $3 x - x^{4} = 4$
4828	Solve by Substitution	4x+5y=3 , 3x+ky=10	$4 x + 5 y = 3$ , $3 x + k y = 10$
4829	Solve by Substitution	-4x+6y=-4 , 3x-3y=8	$- 4 x + 6 y = - 4$ , $3 x - 3 y = 8$
4830	Solve by Substitution	4x+7y-z=1 , 5x+9y+z=2	$4 x + 7 y - z = 1$ , $5 x + 9 y + z = 2$
4831	Solve by Substitution	-4x+9y=40 , 11x+4y=120	$- 4 x + 9 y = 40$ , $11 x + 4 y = 120$
4832	Solve by Substitution	-4x+9y=7 , -4x+9y=5	$- 4 x + 9 y = 7$ , $- 4 x + 9 y = 5$
4833	Solve by Substitution	4x+y=12 , x+3y=12	$4 x + y = 12$ , $x + 3 y = 12$
4834	Solve by Substitution	2x-5y=12 , 1x-3y=-3	$2 x - 5 y = 12$ , $1 x - 3 y = - 3$
4835	Solve by Substitution	2x-5y=13 , 3x+4y=-15	$2 x - 5 y = 13$ , $3 x + 4 y = - 15$
4836	Solve by Substitution	2x-5y=20 , 5y-2x=15	$2 x - 5 y = 20$ , $5 y - 2 x = 15$
4837	Solve by Substitution	5x-7y=-16 , 2x+8y=26	$5 x - 7 y = - 16$ , $2 x + 8 y = 26$
4838	Solve by Substitution	5x-7y=-58 , 7x+5y=52	$5 x - 7 y = - 58$ , $7 x + 5 y = 52$
4839	Solve by Substitution	5x-9y=5 , 30x-54y=30	$5 x - 9 y = 5$ , $30 x - 54 y = 30$
4840	Solve by Substitution	-5x-y=21 , 3x-4y+5z=-8 , -3x-z=12	$- 5 x - y = 21$ , $3 x - 4 y + 5 z = - 8$ , $- 3 x - z = 12$
4841	Solve by Substitution	5x-y=27 , x+2y=12	$5 x - y = 27$ , $x + 2 y = 12$
4842	Solve by Substitution	5x-4y=4 , 3x+y=16	$5 x - 4 y = 4$ , $3 x + y = 16$
4843	Solve by Substitution	5x-4y=5 , -10x+8y=-10	$5 x - 4 y = 5$ , $- 10 x + 8 y = - 10$
4844	Solve by Substitution	5x-4y=-7 , -10x+8y=14	$5 x - 4 y = - 7$ , $- 10 x + 8 y = 14$
4845	Solve by Substitution	-5x-5y=-10 , 25x+25y=51	$- 5 x - 5 y = - 10$ , $25 x + 25 y = 51$
4846	Solve by Substitution	5x-6y=19 , 4+3y=10	$5 x - 6 y = 19$ , $4 + 3 y = 10$
4847	Solve by Substitution	x-2y=-7 , x+y=5	$x - 2 y = - 7$ , $x + y = 5$
4848	Solve by Substitution	x-2y=8 , -9x+3y=4	$x - 2 y = 8$ , $- 9 x + 3 y = 4$
4849	Solve by Substitution	x-2y-z=2 , 2x-y+z=4 , -x+y-2z=-4	$x - 2 y - z = 2$ , $2 x - y + z = 4$ , $- x + y - 2 z = - 4$
4850	Solve by Substitution	x-2z=9 , y+8z=-5	$x - 2 z = 9$ , $y + 8 z = - 5$
4851	Solve by Substitution	x-3y=-15 , 2x-5y=-26	$x - 3 y = - 15$ , $2 x - 5 y = - 26$
4852	Solve by Substitution	x-4y=-4 , 9x-3y=-3	$x - 4 y = - 4$ , $9 x - 3 y = - 3$
4853	Solve by Substitution	x-y+5z=1 , 4x-y+11z=19	$x - y + 5 z = 1$ , $4 x - y + 11 z = 19$
4854	Solve by Substitution	x-y+5z=13 , y-2z=-7 , y+8z=33	$x - y + 5 z = 13$ , $y - 2 z = - 7$ , $y + 8 z = 33$
4855	Solve by Substitution	x-y=2 , 2x+9y=-51	$x - y = 2$ , $2 x + 9 y = - 51$
4856	Solve by Substitution	x-Y=5 , 2x+y=5	$x - Y = 5$ , $2 x + y = 5$
4857	Solve by Substitution	p=q^2+8q+16 , p=-3q^2+6q+436	$p = q^{2} + 8 q + 16$ , $p = - 3 q^{2} + 6 q + 436$
4858	Solve by Substitution	p=4200 , r=3.6%	$p = 4200$ , $r = 3.6 %$
4859	Solve by Substitution	p=5000 , r=4% , t=3 , m=4	$p = 5000$ , $r = 4 %$ , $t = 3$ , $m = 4$
4860	Solve by Substitution	x+2y+3z=90 , 3y+z=36	$x + 2 y + 3 z = 90$ , $3 y + z = 36$
4861	Solve by Substitution	x+2y+z=-2 , 5x+3y-z=-11 , x+5y+3z=-5	$x + 2 y + z = - 2$ , $5 x + 3 y - z = - 11$ , $x + 5 y + 3 z = - 5$
4862	Solve by Substitution	-x+2y=2 , x+y=2 , y=0	$- x + 2 y = 2$ , $x + y = 2$ , $y = 0$
4863	Solve by Substitution	x+2y=-3 , 5x+6y=-7	$x + 2 y = - 3$ , $5 x + 6 y = - 7$
4864	Solve by Substitution	x+2y=3 , x-y=1	$x + 2 y = 3$ , $x - y = 1$
4865	Solve by Substitution	x+2y=4 , 2x-y=-12	$x + 2 y = 4$ , $2 x - y = - 12$
4866	Solve by Substitution	x+2y=4 , 2y=-x+4	$x + 2 y = 4$ , $2 y = - x + 4$
4867	Solve by Substitution	-x+2y=54 , x+4y=54 , 9x+3y=189	$- x + 2 y = 54$ , $x + 4 y = 54$ , $9 x + 3 y = 189$
4868	Solve by Substitution	x+2y=6 , y=2x+3	$x + 2 y = 6$ , $y = 2 x + 3$
4869	Solve by Substitution	x+2y=7 , 2x-y=4	$x + 2 y = 7$ , $2 x - y = 4$
4870	Solve by Substitution	x+2y=7 , 4x-6y=7	$x + 2 y = 7$ , $4 x - 6 y = 7$
4871	Solve by Substitution	x+2y-z=5 , 3x+2y+z=-1 , -x-y+z=-6	$x + 2 y - z = 5$ , $3 x + 2 y + z = - 1$ , $- x - y + z = - 6$
4872	Solve by Substitution	x+2z=4 , 11/2x+y+10z=19 , 4y-4z=-12	$x + 2 z = 4$ , $\frac{11}{2} x + y + 10 z = 19$ , $4 y - 4 z = - 12$
4873	Solve by Substitution	x+3y+4z=15 , 2x-y+z=2	$x + 3 y + 4 z = 15$ , $2 x - y + z = 2$
4874	Solve by Substitution	x+3y=7 , -2x+3y=22	$x + 3 y = 7$ , $- 2 x + 3 y = 22$
4875	Solve by Substitution	x+3y-3z+4w=3 , y+z-w=4 , 2z+2w=6 , 2w=4	$x + 3 y - 3 z + 4 w = 3$ , $y + z - w = 4$ , $2 z + 2 w = 6$ , $2 w = 4$
4876	Solve by Substitution	x+4y+3z=-7 , 5y+4z=-4 , z=4	$x + 4 y + 3 z = - 7$ , $5 y + 4 z = - 4$ , $z = 4$
4877	Solve by Substitution	x+4y=220 , x+2y=120	$x + 4 y = 220$ , $x + 2 y = 120$
4878	Solve by Substitution	x+4y=220 , x+2y=120 , x+y=115	$x + 4 y = 220$ , $x + 2 y = 120$ , $x + y = 115$
4879	Solve by Substitution	x+5y=2 , 2x-8y=22	$x + 5 y = 2$ , $2 x - 8 y = 22$
4880	Solve by Substitution	x+5-z=10 , -x+7y-z=18 , 5x-4y-2z=-14	$x + 5 - z = 10$ , $- x + 7 y - z = 18$ , $5 x - 4 y - 2 z = - 14$
4881	Solve by Substitution	x+6y=-5 , -4x+7y=20	$x + 6 y = - 5$ , $- 4 x + 7 y = 20$
4882	Solve by Substitution	x+9y=54 , -x+8y=31	$x + 9 y = 54$ , $- x + 8 y = 31$
4883	Solve by Substitution	x+x+2x=4 , 3x+5x=-12 , 5x-x=2	$x + x + 2 x = 4$ , $3 x + 5 x = - 12$ , $5 x - x = 2$
4884	Solve by Substitution	x+y+z=-12 , x-2y-z=9 , 2x+2y-z=-21	$x + y + z = - 12$ , $x - 2 y - z = 9$ , $2 x + 2 y - z = - 21$
4885	Solve by Substitution	-x+y+z=-2 , -x+5y-11z=-14 , 3x-y-9z=0	$- x + y + z = - 2$ , $- x + 5 y - 11 z = - 14$ , $3 x - y - 9 z = 0$
4886	Solve by Substitution	x+y+z=4 , x-y+5z=-14 , 5x+y+z=20	$x + y + z = 4$ , $x - y + 5 z = - 14$ , $5 x + y + z = 20$
4887	Solve by Substitution	x+y+z=73 , -2x+5y=80 , x-z=-9	$x + y + z = 73$ , $- 2 x + 5 y = 80$ , $x - z = - 9$
4888	Solve by Substitution	x+y=1 , x-y=6	$x + y = 1$ , $x - y = 6$
4889	Solve by Substitution	x+y=10 , y=4x+5	$x + y = 10$ , $y = 4 x + 5$
4890	Solve by Substitution	x+y=141 , 11x+4y=795	$x + y = 141$ , $11 x + 4 y = 795$
4891	Solve by Substitution	x+y=15 , (10x+y)/4+45=10y+x	$x + y = 15$ , $\frac{10 x + y}{4} + 45 = 10 y + x$
4892	Solve by Substitution	x+y=25 , 4x+2y=60	$x + y = 25$ , $4 x + 2 y = 60$
4893	Solve by Substitution	x+y=28 , 4x-3y=84	$x + y = 28$ , $4 x - 3 y = 84$
4894	Solve by Substitution	x+y=30 , y=5x	$x + y = 30$ , $y = 5 x$
4895	Solve by Substitution	-x+y=4 , 2x-y=-1	$- x + y = 4$ , $2 x - y = - 1$
4896	Solve by Substitution	x+y=-6 , 3x-y=-14	$x + y = - 6$ , $3 x - y = - 14$
4897	Solve by Substitution	x+y=7 , y=x-3	$x + y = 7$ , $y = x - 3$
4898	Solve by Substitution	x+y=760000 , 40x+60y=16000	$x + y = 760000$ , $40 x + 60 y = 16000$
4899	Solve by Substitution	x+y=8 , 5x+4y=34	$x + y = 8$ , $5 x + 4 y = 34$
4900	Solve by Substitution	x+y-3z=-13 , 3x-3+4z=6 , x+3y-2z=-12	$x + y - 3 z = - 13$ , $3 x - 3 + 4 z = 6$ , $x + 3 y - 2 z = - 12$