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28=7(f+2)
We move all terms to the left:
28-(7(f+2))=0
We calculate terms in parentheses: -(7(f+2)), so:We get rid of parentheses
7(f+2)
We multiply parentheses
7f+14
Back to the equation:
-(7f+14)
-7f-14+28=0
We add all the numbers together, and all the variables
-7f+14=0
We move all terms containing f to the left, all other terms to the right
-7f=-14
f=-14/-7
f=+2
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