Answer:
r =

Explanation:
Given: d = rt
Here we have to solve for letter "r".
To solve for letter "r" we have to use inverse operation and solve.
d = rt
We have to get rid of "t" on the right hand side.
"t" is in the multiplication, the inverse operation of multiplication is division.
So divide both sides by t, we get
d/t = rt/t
Simplifying the above equation, we get
d/t = r
Therefore, r =
