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x=3-7
x=-4
2x-3=6+x
2x-x=6+3
x=9
4x-6=6+x
4x-x=6+6
3x=12
x=12/3
x=4
2x+2-3x+6=x+6
2x-3x-x=6-2-6
-2x=-2
x=-2/-2
x=1
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