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4 votes
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?

User Sysop
by
8.1k points

2 Answers

3 votes

The number she started with is 5

5 + 3 = 8

8 x 2 = 16

16 - 7 = 9


Hope this helps

User Nabrown
by
7.9k points
3 votes

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

User Reinis Mazeiks
by
7.4k points
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