r/5 - 6 = -1

A. r = 1

B. r = 5

C. r = 10

D. r = 35

E. r = 25

To solve the equation, we need to isolate the variable r.

Adding 6 to both sides of the equation:

r/5 = 6 - 1

r/5 = 5

Multiplying both sides of the equation by 5:

r = 5 * 5

r = 25

Therefore, the answer is E. r = 25.