#### Answer

x=$\frac{4b}{3}$

#### Work Step by Step

The first step to solving 4x-4b = x is to recognize that you must combine like terms in order to isolate the variables.
The first step is to subtract x from both sides of the equation giving you:
3x-4b = 0
Next, add 4b to both sides giving you:
3x=4b
Lastly, divide both sides by 3 to get rid of the coefficient in front of x giving you the answer:
x=4b/3