Question

Kathy starts with a number. She adds 3 to her number then doubles the result. Finally she subtract 7. If she ended with 9 what number did she start with?

Answer 1

if she has 9, add 7. you have 16. divide it by half, 8. subtract 3 and you get 5.

Answer 2

The number she started with is 5

5 + 3 = 8

8 x 2 = 16

16 - 7 = 9

Hope this helps