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-(x-2)+7(x+1)=27
We move all terms to the left:
-(x-2)+7(x+1)-(27)=0
We multiply parentheses
-(x-2)+7x+7-27=0
We get rid of parentheses
-x+7x+2+7-27=0
We add all the numbers together, and all the variables
6x-18=0
We move all terms containing x to the left, all other terms to the right
6x=18
x=18/6
x=3
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