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80=4(f+11)
We move all terms to the left:
80-(4(f+11))=0
We calculate terms in parentheses: -(4(f+11)), so:We get rid of parentheses
4(f+11)
We multiply parentheses
4f+44
Back to the equation:
-(4f+44)
-4f-44+80=0
We add all the numbers together, and all the variables
-4f+36=0
We move all terms containing f to the left, all other terms to the right
-4f=-36
f=-36/-4
f=+9
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