Solve for f
f=39
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f+3=\frac{7}{2}\times 12
Multiply both sides by 12.
f+3=\frac{7\times 12}{2}
Express \frac{7}{2}\times 12 as a single fraction.
f+3=\frac{84}{2}
Multiply 7 and 12 to get 84.
f+3=42
Divide 84 by 2 to get 42.
f=42-3
Subtract 3 from both sides.
f=39
Subtract 3 from 42 to get 39.
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