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9x-(x-18)=2x-(7+x)
We move all terms to the left:
9x-(x-18)-(2x-(7+x))=0
We add all the numbers together, and all the variables
9x-(x-18)-(2x-(x+7))=0
We get rid of parentheses
9x-x-(2x-(x+7))+18=0
We calculate terms in parentheses: -(2x-(x+7)), so:We add all the numbers together, and all the variables
2x-(x+7)
We get rid of parentheses
2x-x-7
We add all the numbers together, and all the variables
x-7
Back to the equation:
-(x-7)
8x-(x-7)+18=0
We get rid of parentheses
8x-x+7+18=0
We add all the numbers together, and all the variables
7x+25=0
We move all terms containing x to the left, all other terms to the right
7x=-25
x=-25/7
x=-3+4/7
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