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91=-7(x-2)
We move all terms to the left:
91-(-7(x-2))=0
We calculate terms in parentheses: -(-7(x-2)), so:We get rid of parentheses
-7(x-2)
We multiply parentheses
-7x+14
Back to the equation:
-(-7x+14)
7x-14+91=0
We add all the numbers together, and all the variables
7x+77=0
We move all terms containing x to the left, all other terms to the right
7x=-77
x=-77/7
x=-11
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