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126=-3x+3(6x+2)
We move all terms to the left:
126-(-3x+3(6x+2))=0
We calculate terms in parentheses: -(-3x+3(6x+2)), so:We get rid of parentheses
-3x+3(6x+2)
We multiply parentheses
-3x+18x+6
We add all the numbers together, and all the variables
15x+6
Back to the equation:
-(15x+6)
-15x-6+126=0
We add all the numbers together, and all the variables
-15x+120=0
We move all terms containing x to the left, all other terms to the right
-15x=-120
x=-120/-15
x=+8
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