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-3x-x=10-2
-4x=8
4x=-8
x=-8/4
x=-2
2(7-x)+7x=8-5(x-1)+8x+4
14-2x+7X=8-5x+5+8x+4
-2x+7X+5x-8x=8+5+4-14
2x=3
x=3/2
9(x-1)=6(x+3)
9x-9=6x+18
9x-6x=18+9
3x=27
x=27/3
x =9
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