Solve for f
f=2
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16-2f=12
Swap sides so that all variable terms are on the left hand side.
-2f=12-16
Subtract 16 from both sides.
-2f=-4
Subtract 16 from 12 to get -4.
f=\frac{-4}{-2}
Divide both sides by -2.
f=2
Divide -4 by -2 to get 2.
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