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-28=-8x+4(x+2)
We move all terms to the left:
-28-(-8x+4(x+2))=0
We calculate terms in parentheses: -(-8x+4(x+2)), so:We get rid of parentheses
-8x+4(x+2)
We multiply parentheses
-8x+4x+8
We add all the numbers together, and all the variables
-4x+8
Back to the equation:
-(-4x+8)
4x-8-28=0
We add all the numbers together, and all the variables
4x-36=0
We move all terms containing x to the left, all other terms to the right
4x=36
x=36/4
x=9
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