4+10-8+x=10
exp
4x - x
3x
2x+3=7
x=2
2x+3y-2
equation
5x+10-2x+4
3x+14
4x+2(x-5)=20
x=5
4x+2x-6y=15
-4x-x+2+6
-5x+8
-(x-4)+8x-x=46
x=7
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