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27=3(4x-9)
We move all terms to the left:
27-(3(4x-9))=0
We calculate terms in parentheses: -(3(4x-9)), so:We get rid of parentheses
3(4x-9)
We multiply parentheses
12x-27
Back to the equation:
-(12x-27)
-12x+27+27=0
We add all the numbers together, and all the variables
-12x+54=0
We move all terms containing x to the left, all other terms to the right
-12x=-54
x=-54/-12
x=4+1/2
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