Question

What is the value of the rational expression below when x is equal to 4? x+20/x+4

Answer 1

3

Explanation:

All we need to do here is plug in the number 4 for the variable x. Wherever there's an x, kidnap it and replace it with a 4!

`(x + 20)/(x + 4)`

x = 4

`(4 + 20)/(4 + 4)`

Do the addition.

4 + 20 = 24

4 + 4 = 8

`(24)/(8)`

We can simplify this! What is 24 divided by 8?

24/8 = 3

The answer is 3!