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39=-4(7x+7)
We move all terms to the left:
39-(-4(7x+7))=0
We calculate terms in parentheses: -(-4(7x+7)), so:We get rid of parentheses
-4(7x+7)
We multiply parentheses
-28x-28
Back to the equation:
-(-28x-28)
28x+28+39=0
We add all the numbers together, and all the variables
28x+67=0
We move all terms containing x to the left, all other terms to the right
28x=-67
x=-67/28
x=-2+11/28
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