Question

If two times a number is equal to that number minus
4, what is the number?

Answer 1

Let x equal the number, and then 2x = x - 4. Solving for x, we find that x = -4.

Answer 2

Let the number is x

Then according to the question,

⇒2x = x - 4

⇒2x - x = - 4

⇒x - 4