Question

What number decreased by 40 is 5 times that number?

Answer 1

-10

Explanation:

Let the number be x

x - 40 = 5x

4x = -40

x = -10

Answer 2

-10

Explanation:

Let the number be x

x - 40 = 5x

⇒ -40 = 5x - x

⇒ 4x = -40

⇒ x = -40/4

⇒ x = -10