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9x-18=2(4x+5)
We move all terms to the left:
9x-18-(2(4x+5))=0
We calculate terms in parentheses: -(2(4x+5)), so:We get rid of parentheses
2(4x+5)
We multiply parentheses
8x+10
Back to the equation:
-(8x+10)
9x-8x-10-18=0
We add all the numbers together, and all the variables
x-28=0
We move all terms containing x to the left, all other terms to the right
x=28
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