Question

Colin was thinking of a number. Colin adds 18 to it, then doubles it and gets an answer of 65.5. What was the original number?

Answer 1

14.75

Explanation:

65.5/2 = 32.75.

32.75 - 18 = 14.75

thats your answer. hope it helps

Answer 2

Do those steps in reverse to figure out the number.

65.5 ÷ 2 = 32.75.
32.75 - 18 = 14.75.