Maths questions(S.1-S.2)

1. Danny has 14 model cars.

As his mother is worried that he will spend too much money on model cars, she proposes the following to Danny:

" the maximum nuber of model cars that Danny can have is 20."
let the total number of model cars that Danny have be x.

a. Write an inequality to represent this situation.
b. Hence find at most how many more model cars he can have.

(Show the steps in detail ,plz)