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5x-4(-x=4)=-115
We move all terms to the left:
5x-4(-x-(4))=0
We add all the numbers together, and all the variables
5x-4(-1x-4)=0
We multiply parentheses
5x+4x+16=0
We add all the numbers together, and all the variables
9x+16=0
We move all terms containing x to the left, all other terms to the right
9x=-16
x=-16/9
x=-1+7/9
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