solving CAGR challenge

I want to rearrange the following formula to solve for R where

V=(S*((1+R)^(N+1)-1)/(R))-S.

where:
S = 10
V = 39.93375
N = 3

I know the answer is .15.

Essentially, if I compound a starting amount of10 at a rate of 15% for
3 years, the cummulative sum is 39.93375. How do I solve for the
rate if I am given the cummulative sum, the period in years, and the
starting amount?
.