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-7x+5(x-7)=-31
We move all terms to the left:
-7x+5(x-7)-(-31)=0
We add all the numbers together, and all the variables
-7x+5(x-7)+31=0
We multiply parentheses
-7x+5x-35+31=0
We add all the numbers together, and all the variables
-2x-4=0
We move all terms containing x to the left, all other terms to the right
-2x=4
x=4/-2
x=-2
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