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n200080 [17]
3 years ago
3

Someone help me on this.

Mathematics
1 answer:
harina [27]3 years ago
6 0

\frac{f}{5}=\frac{f+3}{20} Cross multiply. (multiply 5 on both sides, and multiply 20 on both sides)

(20)f = 5(f + 3)           Multiply 5 into (f + 3)

20f = 5f + 15         Subtract 5f on both sides

15f = 15        Divide 15 on both sides to get "f" by itself

f = 1

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