Verified Answer :

So,

\(\frac{7f}{11} = \frac{7}{11}\)

Multiply both sides by 11.
\(7f = 7\)

Divide both sides by 7.
f = 1

Check.
\(\frac{7(1)}{11} = \frac{7}{11}\)
\(\frac{7}{11} = \frac{7}{11}\) This checks.

S = {1}

7f/11=7/11

Cross-multiply.

(7f)/11=7/11

7f(11)=(7)(11)

77f=77

Divide both sides by 77.

77f/77=77/77

f=1