Question

K=3r-s , solve for r

Answer 1

Answer:

r = k+s/ 3

Step-by-step explanation:

$K = 3r-5$

$K+s= 3r$

$\frac{k+s}{3}= r$

therefore, r=k+s/3

Answer 2

$3r-s=K\qquad\text{add s to both sides}\\\\3r=K+s\qquad\text{divide both sides by 3}\\\\\boxed{r=\dfrac{K+s}{3}}$