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2x+3=-3(-2x+7)
We move all terms to the left:
2x+3-(-3(-2x+7))=0
We calculate terms in parentheses: -(-3(-2x+7)), so:We get rid of parentheses
-3(-2x+7)
We multiply parentheses
6x-21
Back to the equation:
-(6x-21)
2x-6x+21+3=0
We add all the numbers together, and all the variables
-4x+24=0
We move all terms containing x to the left, all other terms to the right
-4x=-24
x=-24/-4
x=+6
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