Solve for f
f = \frac{413}{12} = 34\frac{5}{12} \approx 34.416666667
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12f+7=420
Multiply both sides of the equation by 420, the least common multiple of 35,60.
12f=420-7
Subtract 7 from both sides.
12f=413
Subtract 7 from 420 to get 413.
f=\frac{413}{12}
Divide both sides by 12.
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