Question

If one-half of a number decreased by 20 is 40, what is the number?

Answer 1

The number is: 120

Explanation:

We have one-half of "a" decreased by 20 is 40

This means that:

(1/2)a-20=40

(1/2)a=60

a=120

Answer 2

120

Explanation:

Just add the 20 back to 40 and times by 2

40 + 20 = 60

60 * 2 = 120