Question

How do you solve `6/(b-1)=9/7`?

Answer 1

B = `17/3`

Explanation:

`6/(b-1)` = `9/7`
All we have to do is cross multiply
(6)(7) = 9(b - 1)
42 = 9b - 9
Change them side
9b - 9 = 42
9b = 42 + 9
9b = 51
Divide both sides by 9
`(9b)/9` = `51/9`
b = `17/3`
But if they want the answer in decimal, it is b =5.57