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85=15+2(7-2x)
We move all terms to the left:
85-(15+2(7-2x))=0
We add all the numbers together, and all the variables
-(15+2(-2x+7))+85=0
We calculate terms in parentheses: -(15+2(-2x+7)), so:We get rid of parentheses
15+2(-2x+7)
determiningTheFunctionDomain 2(-2x+7)+15
We multiply parentheses
-4x+14+15
We add all the numbers together, and all the variables
-4x+29
Back to the equation:
-(-4x+29)
4x-29+85=0
We add all the numbers together, and all the variables
4x+56=0
We move all terms containing x to the left, all other terms to the right
4x=-56
x=-56/4
x=-14
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