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4x+40=-8(x+7)
We move all terms to the left:
4x+40-(-8(x+7))=0
We calculate terms in parentheses: -(-8(x+7)), so:We get rid of parentheses
-8(x+7)
We multiply parentheses
-8x-56
Back to the equation:
-(-8x-56)
4x+8x+56+40=0
We add all the numbers together, and all the variables
12x+96=0
We move all terms containing x to the left, all other terms to the right
12x=-96
x=-96/12
x=-8
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