saylastudent2019 saylastudent2019

17-10-2019
Mathematics

contestada

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

Respuesta :

bellasmith1113 bellasmith1113

17-10-2019

Answer:13-x= y

Step-by-step explanation:

Answer Link

sienna893 sienna893

17-10-2019

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...)

Answer Link

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