Carol is 15 years old. She is zz years older than Abbie. How old is Abbie?

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Worked solution

4

1. Formulate the expression for Abbie's age

Carol's age = 1515
Carol is zz years older than Abbie, which means Abbie is zz years younger than Carol.
Abbie's age = 15−z15 - z

Answer

(15−z)(15 - z) years old (option 2)

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