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X+8=-(3X-4)
We move all terms to the left:
X+8-(-(3X-4))=0
We calculate terms in parentheses: -(-(3X-4)), so:We get rid of parentheses
-(3X-4)
We get rid of parentheses
-3X+4
Back to the equation:
-(-3X+4)
X+3X-4+8=0
We add all the numbers together, and all the variables
4X+4=0
We move all terms containing X to the left, all other terms to the right
4X=-4
X=-4/4
X=-1
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