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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| 5x-2y=-13;-5x+2y=-4 | | x+5y=6;x+4y=4 | | x+y=3;x-3y=15 | | x+8/3=12-4y/5;6x/7=30-9y/14 | | x/4+y=7/4;-x+4y=-7 | | y=2.3x;y=0.7x+3000 | | y=2.5x;y=0.9x+3000 | | y=2.2x;y=0.6x+2000 | | y=2.4x;y=0.8x+3000 | | y=0.9x+3000;y=x+2.5x | | y=-0.7x+94;y=x+52 | | y=-0.4x+90;y=x+65 | | x+12/7=4-5y/8;9x/4=150-3y/8 | | 7/6x-3/2y=4;-11/12x+5/4y=-3 | | 2.4x;0.8x+3000 | | 1/x+1/y=9;1/x-1/y=3 | | 3/x-9/y=4;1/x-3/y=8/3 | | 2/x+3/y=-5;3/x-2/y=12 | | 4x-3y=16;16x+10y=240 | | y-2x=5;3y=6x+15 | | y=5x-7;y=5x+6 | | -4x-2y=3;-4y=6+8x | | x+y=-2;x-y=16 | | 4x+3y=-2;-4x-6y=8 | | x+y=-9;x-y=-3 | | 2x+y=4;2x+y=6 | | 4x+16y=16;7x-8y=-8 | | 6x+3y=3;x+4y=25 | | x+5y=5;5x-2y=-2 | | 2x+4y=22;3x+2y=17 | | x-7y=49;7x-7y=91 | | 4x-7.3y=77.11;2x+3.7y=-25.39 |