95.5k views
4 votes
How old was Lisa x years ago if she is now 13?

Which expression represents this?

x + 13
x - 13
13 - x

2 Answers

4 votes

Answer:

13 - X

Explanation:

User Anton Shishkin
by
8.1k points
5 votes
13 minus x because it will equal her age
User Melik
by
8.4k points