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3x-4=-(2x+15)
We move all terms to the left:
3x-4-(-(2x+15))=0
We calculate terms in parentheses: -(-(2x+15)), so:We get rid of parentheses
-(2x+15)
We get rid of parentheses
-2x-15
Back to the equation:
-(-2x-15)
3x+2x+15-4=0
We add all the numbers together, and all the variables
5x+11=0
We move all terms containing x to the left, all other terms to the right
5x=-11
x=-11/5
x=-2+1/5
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