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27=3(3x-9)
We move all terms to the left:
27-(3(3x-9))=0
We calculate terms in parentheses: -(3(3x-9)), so:We get rid of parentheses
3(3x-9)
We multiply parentheses
9x-27
Back to the equation:
-(9x-27)
-9x+27+27=0
We add all the numbers together, and all the variables
-9x+54=0
We move all terms containing x to the left, all other terms to the right
-9x=-54
x=-54/-9
x=+6
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