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-8(f+83)=-72
We move all terms to the left:
-8(f+83)-(-72)=0
We add all the numbers together, and all the variables
-8(f+83)+72=0
We multiply parentheses
-8f-664+72=0
We add all the numbers together, and all the variables
-8f-592=0
We move all terms containing f to the left, all other terms to the right
-8f=592
f=592/-8
f=-74
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