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84=-2(8x-2)
We move all terms to the left:
84-(-2(8x-2))=0
We calculate terms in parentheses: -(-2(8x-2)), so:We get rid of parentheses
-2(8x-2)
We multiply parentheses
-16x+4
Back to the equation:
-(-16x+4)
16x-4+84=0
We add all the numbers together, and all the variables
16x+80=0
We move all terms containing x to the left, all other terms to the right
16x=-80
x=-80/16
x=-5
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