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30+4x=-2(x-6)
We move all terms to the left:
30+4x-(-2(x-6))=0
We calculate terms in parentheses: -(-2(x-6)), so:We get rid of parentheses
-2(x-6)
We multiply parentheses
-2x+12
Back to the equation:
-(-2x+12)
4x+2x-12+30=0
We add all the numbers together, and all the variables
6x+18=0
We move all terms containing x to the left, all other terms to the right
6x=-18
x=-18/6
x=-3
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