Age question

by Sean
(Singapore)

If anyone can help to explain the working in model method. yes the answer is 45, but i just need the model method. Singapore Primary 3.



Jessie is 10 years old. She asks Grandpa for his age.
Grandpa replies, "When you multiply my age by 2, then divide by 9, you will get your age."
What is Grandpa's age?

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Jun 30, 2021
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by: Zach

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