solve for r.\n17r - 13r = 20\nr =

Explanation:

Step1: Combine like - terms

$17r - 13r=(17 - 13)r = 4r$, so the equation becomes $4r = 20$.

Step2: Solve for r

Divide both sides of the equation $4r = 20$ by 4, we get $r=\frac{20}{4}$.

Answer:

$5$