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30=-2(-3x+3)
We move all terms to the left:
30-(-2(-3x+3))=0
We calculate terms in parentheses: -(-2(-3x+3)), so:We get rid of parentheses
-2(-3x+3)
We multiply parentheses
6x-6
Back to the equation:
-(6x-6)
-6x+6+30=0
We add all the numbers together, and all the variables
-6x+36=0
We move all terms containing x to the left, all other terms to the right
-6x=-36
x=-36/-6
x=+6
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