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-3(x-4)=-39-9)
We move all terms to the left:
-3(x-4)-(-39-9))=0
We add all the numbers together, and all the variables
-3(x-4)-(-48))=0
We add all the numbers together, and all the variables
-3(x-4)=0
We multiply parentheses
-3x+12=0
We move all terms containing x to the left, all other terms to the right
-3x=-12
x=-12/-3
x=+4
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