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-3x+39=9(x+3)
We move all terms to the left:
-3x+39-(9(x+3))=0
We calculate terms in parentheses: -(9(x+3)), so:We get rid of parentheses
9(x+3)
We multiply parentheses
9x+27
Back to the equation:
-(9x+27)
-3x-9x-27+39=0
We add all the numbers together, and all the variables
-12x+12=0
We move all terms containing x to the left, all other terms to the right
-12x=-12
x=-12/-12
x=1
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