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x-31=2(x+6)
We move all terms to the left:
x-31-(2(x+6))=0
We calculate terms in parentheses: -(2(x+6)), so:We get rid of parentheses
2(x+6)
We multiply parentheses
2x+12
Back to the equation:
-(2x+12)
x-2x-12-31=0
We add all the numbers together, and all the variables
-1x-43=0
We move all terms containing x to the left, all other terms to the right
-x=43
x=43/-1
x=-43
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