Respuesta :

Answer:

The answer is 7

Step-by-step explanation:

an easier way to think of it is 21 divided by 3, which again, is 7.

Hope That Helps!

Answer:

7

Step-by-step explanation:

Let x be the unknown number

times is multiply and is means equals

3x = 21

Divide each side by 3

3x/3 = 21/3

x = 7