Question

Twice a certain number is 44. What is the number?
equation:
n=

Answer 1

2n = 44
n = 22 (Divide by 2)

Hope I helped.

Answer 2

equation: n = 2n = 44
To work this out, do the opposite of multiplication on both sides of the equation.
This means: 
2n/2 = 44/2

^ a rule is, what you do to one side, you must do to the other. 

This leaves you with n = 22.