2x + 5 = 21, solve for x

x = 8

Step-by-step explanation:

In order to solve for x, we have to isolate the x variable

2x + 5 = 21

First, subtract 5 from both sides of the equation to isolate the 2x

2x = 16

Divide both sides by 2 to isolate the x

x = 8

We can check to makes sure that this answer is correct by plugging it back into the equation and solving.

2 (8) + 5 = 21

16 + 5 = 21

21 = 21