Question

How do you solve `9/(b+5)=3/(b-3)`?

Answer 1

`b=7`

Explanation:

`frac{9}{b+5}=frac{3}{b-3}`

Cross multiply:
`9(b-3)=3(b+5)`

Distribute:
`9b-27=3b+15`

Solve for b:
`6b=42`

`b=7`

*Make sure the answer works in the original function, and make sure you don't divide by zero.