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-90=4x-7(-x+5)
We move all terms to the left:
-90-(4x-7(-x+5))=0
We add all the numbers together, and all the variables
-(4x-7(-1x+5))-90=0
We calculate terms in parentheses: -(4x-7(-1x+5)), so:We get rid of parentheses
4x-7(-1x+5)
We multiply parentheses
4x+7x-35
We add all the numbers together, and all the variables
11x-35
Back to the equation:
-(11x-35)
-11x+35-90=0
We add all the numbers together, and all the variables
-11x-55=0
We move all terms containing x to the left, all other terms to the right
-11x=55
x=55/-11
x=-5
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