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4=4(-7-4x)
We move all terms to the left:
4-(4(-7-4x))=0
We add all the numbers together, and all the variables
-(4(-4x-7))+4=0
We calculate terms in parentheses: -(4(-4x-7)), so:We get rid of parentheses
4(-4x-7)
We multiply parentheses
-16x-28
Back to the equation:
-(-16x-28)
16x+28+4=0
We add all the numbers together, and all the variables
16x+32=0
We move all terms containing x to the left, all other terms to the right
16x=-32
x=-32/16
x=-2
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