# Solve for f f=b/(1/r+c)

f=b1r+c
Simplify the denominator.
To write c as a fraction with a common denominator, multiply by rr.
f=b1r+crr
Combine the numerators over the common denominator.
f=b1+crr
f=b1+crr
Multiply the numerator by the reciprocal of the denominator.
f=br1+cr
Combine b and r1+cr.
f=br1+cr
Solve for f f=b/(1/r+c)

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