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3f-12=3(f-4)
We move all terms to the left:
3f-12-(3(f-4))=0
We calculate terms in parentheses: -(3(f-4)), so:We get rid of parentheses
3(f-4)
We multiply parentheses
3f-12
Back to the equation:
-(3f-12)
3f-3f+12-12=0
We add all the numbers together, and all the variables
=0
f=0/1
f=0
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