Question

G(r)=−5r+13
g(3)=

I'm still confused on how to do this

Answer 1

If you're solving for g then move all terms to the left side and set equal to zero. Then set each factor equal to zero.

And your answer becomes
`g=(5r)/(r-39)`

If you're solving for r then then move all terms to the left side and set equal to zero. Then set each factor equal to zero and your answer is
`r=(39g)/(g-5)`