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8x-4(-5x)=(-31)
We move all terms to the left:
8x-4(-5x)-((-31))=0
We add all the numbers together, and all the variables
8x-4(-5x)+31=0
We multiply parentheses
8x+20x+31=0
We add all the numbers together, and all the variables
28x+31=0
We move all terms containing x to the left, all other terms to the right
28x=-31
x=-31/28
x=-1+3/28
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