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91=4x-(-35)
We move all terms to the left:
91-(4x-(-35))=0
We calculate terms in parentheses: -(4x-(-35)), so:We get rid of parentheses
4x-(-35)
We add all the numbers together, and all the variables
4x+35
Back to the equation:
-(4x+35)
-4x-35+91=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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