Question

PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

`R = \frac {3ST}{2S + T}`

Explanation:

Given the equation;

`\frac {3}{R} - \frac {1}{S} = \frac {2}{T}`

Rearranging the equation, we have;

`\frac {3}{R} = \frac {2}{T} + \frac {1}{S}`

Lowest common multiple (LCM) of S and T is ST.

`\frac {3}{R} = \frac {2S + T}{ST}`

Cross-multiplying, we have;

`3ST = R(2S + T)`

Making R, the subject of formula;

`R = \frac {3ST}{2S + T}`