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AysviL [449]
3 years ago
15

How old was Lisa x years ago if she is now 13? Which expression represents this?

Mathematics
2 answers:
svlad2 [7]3 years ago
7 0

Answer:

a = 13 - x

Step-by-step explanation:

Age = a

(Any other letter of substitution for age would be fine)

For example if x was 5 :

a = 13 - 5

a = 8

For further study:

  • Research algebra on either website. (eg: Maths Is Fun, Khan Academy...)
gogolik [260]3 years ago
6 0

Answer:13-x= y

Step-by-step explanation:

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