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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14
| x-23x+5;x+3-3 | | 5x-2y=23;-4x+2y=-18 | | Y=3x-5;Y=-x+23 | | 5x+6y=0;-(x-3)+6y=39 | | 4x-99y=499;2x+75y=125 | | 2x+5y=69;y-4(x-7)=67-3x | | 3x+2y=19;3x-11y=8y-48 | | 4x+7y=32;2x-3y=18 | | 2x+6y=-16;x+3y=-8 | | -3x-12y=8;x+4y=10 | | x-7y=-8;x-3y=0 | | 6x+y=9;x-2y=8 | | x+4y=5;x-3=-2 | | x+y=48;4x+2y=140 | | 4x-5y=17;x=-y+2 | | 6x-y=9;y=-6x+1 | | 2x-y=9;x=3y-8 | | x+y=-7;y=2x+9 | | x+4y=6;5x-4y=0 | | -6x-2y=6;2y=-6x-6 | | -6x-2y=24;6y=-18x-72 | | x+4y=5;4x-8y=2 | | 4x+2y=8;y=5-3x | | 4x+2y=8;y-5-3x | | 21x+3y=-5;y=-7x | | 3/11x-1/2y=5/11;2/5x-1/3y=2/15 | | x-y=14;-x-y=12 | | 4x+7y=-17;3x+2y=-3 | | 3x-2y=8;5x-3y=16 | | 6x-5y=1;-2x+9y=7 | | -4x+5y=-11;2x+3y=11 | | 3x+4y=-1;-9x-4y=13 |