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-28+7x=7(-4+8x)
We move all terms to the left:
-28+7x-(7(-4+8x))=0
We add all the numbers together, and all the variables
7x-(7(8x-4))-28=0
We calculate terms in parentheses: -(7(8x-4)), so:We get rid of parentheses
7(8x-4)
We multiply parentheses
56x-28
Back to the equation:
-(56x-28)
7x-56x+28-28=0
We add all the numbers together, and all the variables
-49x=0
x=0/-49
x=0
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