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-18=x-2+7x
We move all terms to the left:
-18-(x-2+7x)=0
We add all the numbers together, and all the variables
-(8x-2)-18=0
We get rid of parentheses
-8x+2-18=0
We add all the numbers together, and all the variables
-8x-16=0
We move all terms containing x to the left, all other terms to the right
-8x=16
x=16/-8
x=-2
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