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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| x=2y-12;x=-6+20 | | -4x+7y=9;2y=x+2 | | 8x=y+31;5x+4y=23 | | 3x+2y=2;-2+y=8 | | 3x-4y=0;2x+y=11 | | 2x+4y=-2;5x+7y=-2 | | x+y=1000;0.05x+0.06y=57 | | y=3x+5;-3x+y=10 | | 0.6y;3y-4 | | 2x+5y=10;4x-2y=16 | | x+3y=6;5x-9x=14 | | y=(1/3)x+(2/3);5x-3y=9 | | -2x-2y=6;2y=-2x-6 | | x+3y=3;5x-3y=3 | | 2x+4y=15;y=5-3x | | 3a-b;a+3b | | 6x+2y=6;y=5-7x | | x+2y=4;6x-4y=0 | | y=5x-8;y=4x-7 | | -6x-6y=12;12y=-12x-24 | | x+3y=5;4x-3y=0 | | 2x+7y=16;-2x-3y=8 | | x^2-8x+16;x^2+3x-28 | | y=-1/2x+5;4y+2x=48 | | 7x+6y=-45;-7x+y=66 | | y=-4x+2;y=-4x-5 | | 21x+3y=9;y=7x+3 | | 72x+8y=32;y=-9x+4 | | 1/2x-1/3y=6;1/4x+2/3y=8 | | 8x+40y=11;x=1-5y | | 6x-5y=64;3x+2y=-4 | | (7x/2)+(7y/3)=(161/6);(x/4)+(y/3)=(31/12) |