Low Yi Yin's answer to Emily's Secondary 1 Maths Singapore question.

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Low Yi Yin
Low Yi Yin's answer
251 answers (Tutor Details)
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Hope this helps! ;))
Emily
Emily
1 year ago
How come the father age is 3x
Emily
Emily
1 year ago
Is not 1/3x?
Low Yi Yin
Low Yi Yin
1 year ago
There is no father? Joseph's age is 1/3 of his sister Jolin. Another way to say this is: Jolin is three times of Joseph's age. Jolin age = three times of Joseph = 3x.

Of course, you can do another way via the 1/3 way instead, whereby 1/3 (jolin's age) = Joseph's age. However, you will run into fractions that can lead to a higher chance of mistakes. So, to make things less complicated (by making all of the algebra whole numbers), I chose to times three of Joseph's age.

Hope this clarifies everything! ;))
Emily
Emily
1 year ago
Opps sorry. I mean Joseph age is 1/3 of his sister age so i need to x3
Emily
Emily
1 year ago
Thanks