a=b+r/r+1, r≠-1 is the right answer. First you had to used their factor. And it gave us, [tex]a(r+1)=b+r[/tex]. Then you divide by r+1 from both sides of equation. And it gave us, [tex]\frac{a(r+1)}{r+1}= \frac{b}{r+1}+ \frac{r}{r+1}; r\neq-1[/tex]. And finally simplify, and it gave us the answer is a=b+r/r+1, r≠-1 is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie
