Question

what is the inverse of A(r)=15+3r ? ​

Answer 1

Answer:

$\frac{r}{3} - 15$

Step-by-step explanation:

Swap places with A(r) and r so we have

$r = 15 + 3a(r)$

Solve for a(r).

$\frac{r}{3} = 15 + a(r)$

$\frac{r}{3} - 15 = a(r)$