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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| x+5y=4;4x-15y=2 | | -2x-4y=4;16y=-8x-16 | | y=8x-8;y-8x=9 | | y+9-y+5;(y+9)(y+5) | | x-2y=1;2x+y=7 | | -4x+y=-11;2x-3y=5 | | 2x-y=-5;4x+5y=14 | | 2x+3y=11;x-4y=0 | | x-(5-(3x+4));8 | | 7-4i;9+2i | | a/a-4;3/16-a^2 | | 4x-7y=10;-3x+2y=-9 | | 2x-y=6;y=-4/3x+1 | | 7x-6y=13;6x-5y=11 | | x-y=4;-x+2y=-3 | | 5x+4-1;5x+41 | | y=2377960+26x;y=2067959+125x | | y=209x+8000000;y=599x | | y=-3500+60x;y=-90x | | y=3x-7;y-3x=5 | | -2x-4y=1;12y=-6x-3 | | x+2y=4;9x-4y=3 | | 2x+5y=10;y=2-x | | -3x-4y=2;8y=-6x-4 | | 7x-5y=-18;9x+2y=19 | | x+y=11;-6x-y=-26 | | -3x+y=23;y=8x+68 | | -9x-7y=37;4x+y=-27 | | -5x-3y=23;-9x-9y=27 | | 3x+14y=23;20x+12y=48 | | x-8y=-8;-2x+5y=-6 | | -7x+2y=-42;y=8x-48 |