The given equation $\frac{49}{p} = \frac{49}{q} - \frac{49}{r} - \fra…

Question

Prompt

The given equation

\frac{49}{p} = \frac{49}{q} - \frac{49}{r} - \frac{49}{s}

relates the positive variables

p, q, r

, and

s

. Which of the following is equivalent to

q

p + r + s

49 (p + r + s)

\frac{p r s}{p r + p s + r s}

\frac{p r s}{49 p + 49 r + 49 s}