Question

Solve for b3/4b + 9 = 21

Answer 1

`(3)/(4b)+9=21`

subtract 9 from both-side

`(3)/(4b)=21-9`
`(3)/(4b)=12`

cross multiply

`48b=3`

Divide both-side by 48

`b=(3)/(48)`
`b=(1)/(16)`