Question

What is the inverse of A(r)=15+3r ? ​

Answer 1

`(r)/(3) - 15`

Explanation:

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

`r = 15 + 3a(r)`

Solve for a(r).

`(r)/(3) = 15 + a(r)`

`(r)/(3) - 15 = a(r)`