Assuming you're trying to find the value of r...
Answer:
r = 1
Explanation:
Take your starting equation:
16 = 16r
Since r is multiplied by 16, divide both sides by 16 to isolate r.
16 / 16 = 1
16r / 16 = r
The result is 1 = r, which can be written as:
r = 1