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3x+30=-3(x-8)
We move all terms to the left:
3x+30-(-3(x-8))=0
We calculate terms in parentheses: -(-3(x-8)), so:We get rid of parentheses
-3(x-8)
We multiply parentheses
-3x+24
Back to the equation:
-(-3x+24)
3x+3x-24+30=0
We add all the numbers together, and all the variables
6x+6=0
We move all terms containing x to the left, all other terms to the right
6x=-6
x=-6/6
x=-1
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