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-6(x+3)=2x-42
We move all terms to the left:
-6(x+3)-(2x-42)=0
We multiply parentheses
-6x-(2x-42)-18=0
We get rid of parentheses
-6x-2x+42-18=0
We add all the numbers together, and all the variables
-8x+24=0
We move all terms containing x to the left, all other terms to the right
-8x=-24
x=-24/-8
x=+3
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