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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| 2x+2y=2;y=5-3x | | x+4y=5;5x-12y=1 | | x+4y=6;6x-8y=12 | | -4x-4y=4;16y=-16x-16 | | 3x+2y=80.39;3y+2x=75.61 | | x+4y=7;4x-8y=10 | | 4x-24=-y;4x-y=0 | | -6x+10y=5;-2x+3y=-1 | | 2x-3y=0;4x+3y=11 | | 3x+4y=5;-6x-5y=8 | | x+2y=20;x+2y-5=15 | | x+2y=20;x+2y-5=20 | | x+2y=20;x | | x+2y=20;x=2y-5 | | x+2y=20;x+5+2y=20 | | x+2y=20;x+5+2y=15 | | x+7y=124;x+9y=146 | | y-x=1;x*y=6 | | x^2+y^2=10;2x^2-y^2=17 | | 6x-5y=-14;5x-9y=10 | | 5x+6y=-2y+16;2x-4y=1+6y | | 3x-2=2y;x+4y=-5/3 | | 2X-Y=4;4X+3Y=-7 | | x-1;y-1 | | 2x-9y=-36;9x+2y=93 | | 0.07x-0.01y=3.9;0.23x+0.13y=17.7 | | 6x-7=39;x-9y=34 | | 9x-5y=-20;9x=5y-20 | | 32x+24y=42;36x+27y=-26 | | 11x-3y=-39;6x+12y=-19 | | 2x-4y=40;8x-3y=82 | | 2x+3y=8;9x-3y=14 |