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-3(6+5x)=-138
We move all terms to the left:
-3(6+5x)-(-138)=0
We add all the numbers together, and all the variables
-3(5x+6)-(-138)=0
We add all the numbers together, and all the variables
-3(5x+6)+138=0
We multiply parentheses
-15x-18+138=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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