If it's not what You are looking for type in the system of equations solver your own equations and let us solve it.
Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| 2l+2w=28;l=w+8 | | 2x+28y=256;x+21y=191 | | x+y=87;x-3y+15 | | y=87-x;3x-y=15 | | x+y=87;3x-y=15 | | l=w+0.20;2l+2w=204 | | h+l=38;120h+80l=3280 | | 207c+165t=5055798;69c+104t=2528066 | | c+t=2528066;207c-165t=5055798 | | c+t=2528066;207c+165t=5055798 | | 5d+2c=5.23;4d+4c=6.08 | | 93x+9y=20;71x+7y=18 | | 2r+2c=20;5r-5c=20 | | 10x+6y=124;8x+18y=218 | | x+y=15;1x-y=1 | | c+s=98;121c+294s=19643 | | 2x+3y=14;3x+9y-39 | | x+y=22;2x+1y=13 | | x+y=22;2x-1y=13 | | y=22-x;2x+1y=13 | | 3x+y=14;x+y=8 | | 1w+1c=16.4;8.8w-8.8c=16.4 | | 3a+4c=96;2a+3c=68 | | y=523-x;0.03x+0.07y=30.29 | | x=-5;y=4x+2 | | y=523-x;0.03x+0.07y=30.39 | | x=y-46;2y-1x=7 | | 1/3b+1/3c=4;1/6b-1/3c=4 | | 2x-y=4;y=-x+5 | | x=y+6;x+y=-2 | | 6x-9y=-15;5x-2y=-40 | | 3x+y=-14;4x+3y=-22 |