Question

I am in a timed test please help!

3x + 12 = 21

Answer 1

x = 3

Explanation:

3x + 12 = 21

- 12 -12

---------------------

3x = 9

divide by 3 on both sides to isolate

x = 3

Answer 2

x=3.

Explanation:

3x+12=21.

3x=21-12.

3x=9.

x=3.