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6x+30=-6(x-7)
We move all terms to the left:
6x+30-(-6(x-7))=0
We calculate terms in parentheses: -(-6(x-7)), so:We get rid of parentheses
-6(x-7)
We multiply parentheses
-6x+42
Back to the equation:
-(-6x+42)
6x+6x-42+30=0
We add all the numbers together, and all the variables
12x-12=0
We move all terms containing x to the left, all other terms to the right
12x=12
x=12/12
x=1
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