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23+2x=-7(7-2x)
We move all terms to the left:
23+2x-(-7(7-2x))=0
We add all the numbers together, and all the variables
2x-(-7(-2x+7))+23=0
We calculate terms in parentheses: -(-7(-2x+7)), so:We get rid of parentheses
-7(-2x+7)
We multiply parentheses
14x-49
Back to the equation:
-(14x-49)
2x-14x+49+23=0
We add all the numbers together, and all the variables
-12x+72=0
We move all terms containing x to the left, all other terms to the right
-12x=-72
x=-72/-12
x=+6
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