If you're trying to solve for r, I think I have an answer for you First, to simplify the problem, we must divide each side by -25. -3125 / -25 = 125. -25 * r^3 / -25 = r^3. Therefore, 125 = r^3. Lets simplify further. Log3 125 = r. Since log3 125 also equals 5 (because 5^3 = 125), r = 5.
