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10-09-2021
Mathematics

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Sally, Sue and Sara are friends. Sue's age is twice Sally's age. Sara is 1 year younger than Sue. The
sum of their ages is 49. Find their ages.

Respuesta :

10-09-2021

Sue = 2 Sally
Sara = Sue - 1
= (2Sally) - 1
Sally + Sue + Sara = 49
Sally + 2 Sally + 2 Sally - 1 = 49
5 Sally = 49 + 1
5 Sally = 50
Sally = 10
Sue = 20
Sara = 19

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