Question

How do I solve p=e squared/r when solving for r? ​

Answer 1

Answer:  $\displaystyle r = \frac{e^2}{p}$

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Work Shown:

$p = \frac{e^2}{r}\\\\pr = e^2\\\\r = \frac{e^2}{p}$

Explanation:

In the second step, I multiplied both sides by r to move it to the left side. Then I divided both sides by p to isolate r.

In short, the r and p swap places.