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2x-4=-(4x+9)
We move all terms to the left:
2x-4-(-(4x+9))=0
We calculate terms in parentheses: -(-(4x+9)), so:We get rid of parentheses
-(4x+9)
We get rid of parentheses
-4x-9
Back to the equation:
-(-4x-9)
2x+4x+9-4=0
We add all the numbers together, and all the variables
6x+5=0
We move all terms containing x to the left, all other terms to the right
6x=-5
x=-5/6
x=-5/6
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