# How do you solve #4/(b-3.9)=2/(b+1)#?

##### 1 Answer

Jul 29, 2017

#### Explanation:

Given

If we multiply both sides by

(sometimes called "cross-multiplying")

we get

Expanding

Simplifying

Jul 29, 2017

Given

If we multiply both sides by

(sometimes called "cross-multiplying")

we get

Expanding

Simplifying