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8x+28=4(3x+4)
We move all terms to the left:
8x+28-(4(3x+4))=0
We calculate terms in parentheses: -(4(3x+4)), so:We get rid of parentheses
4(3x+4)
We multiply parentheses
12x+16
Back to the equation:
-(12x+16)
8x-12x-16+28=0
We add all the numbers together, and all the variables
-4x+12=0
We move all terms containing x to the left, all other terms to the right
-4x=-12
x=-12/-4
x=+3
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