Question

1/R +1/v = 1/s despeje de fórmula (despejar R)

Answer 1

1/R+1/v=1/s
1/R=1/s-1/v
1=R (1/s-1/v)
R=1/1/s-1/v

Answer 2

$\displaystyle \frac{1}{R}+\frac{1}{v}=\frac{1}{s} \\[6pt] \frac{1}{R}=\frac{1}{s}-\frac{1}{v} \\[6pt] \frac{1}{R}=\frac{v-s}{sv}\\[6pt] \text{Se invierte a ambos lados las fracciones :} \\[6pt] \frac{R}{1}=\frac{vs}{v-s} \\[6pt] \Rightarrow \ R=\frac{vs}{v-s}$