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9f=9(2f+3)
We move all terms to the left:
9f-(9(2f+3))=0
We calculate terms in parentheses: -(9(2f+3)), so:We get rid of parentheses
9(2f+3)
We multiply parentheses
18f+27
Back to the equation:
-(18f+27)
9f-18f-27=0
We add all the numbers together, and all the variables
-9f-27=0
We move all terms containing f to the left, all other terms to the right
-9f=27
f=27/-9
f=-3
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