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x=13(x-9)
We move all terms to the left:
x-(13(x-9))=0
We calculate terms in parentheses: -(13(x-9)), so:We get rid of parentheses
13(x-9)
We multiply parentheses
13x-117
Back to the equation:
-(13x-117)
x-13x+117=0
We add all the numbers together, and all the variables
-12x+117=0
We move all terms containing x to the left, all other terms to the right
-12x=-117
x=-117/-12
x=9+3/4
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