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56=4x-4(4x+7)
We move all terms to the left:
56-(4x-4(4x+7))=0
We calculate terms in parentheses: -(4x-4(4x+7)), so:We get rid of parentheses
4x-4(4x+7)
We multiply parentheses
4x-16x-28
We add all the numbers together, and all the variables
-12x-28
Back to the equation:
-(-12x-28)
12x+28+56=0
We add all the numbers together, and all the variables
12x+84=0
We move all terms containing x to the left, all other terms to the right
12x=-84
x=-84/12
x=-7
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