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9(x+7)=2(5x-9)
We move all terms to the left:
9(x+7)-(2(5x-9))=0
We multiply parentheses
9x-(2(5x-9))+63=0
We calculate terms in parentheses: -(2(5x-9)), so:We get rid of parentheses
2(5x-9)
We multiply parentheses
10x-18
Back to the equation:
-(10x-18)
9x-10x+18+63=0
We add all the numbers together, and all the variables
-1x+81=0
We move all terms containing x to the left, all other terms to the right
-x=-81
x=-81/-1
x=+81
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