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primary 6 | Maths | Ratio
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Date Posted: 3 months ago
Views: 39
Edward Yang
Edward Yang
3 months ago
Let 3x be the number of non-fiction books Galvin bought.
Then Galvin bought 5x fiction books.

Let 3y be the number of non-fiction books Gavin have not read yet.
Then Galvin have not read 4y fiction books yet.

We know that:

3x - 6 = 3y

5x - 13 = 4y

Simplify:

x - 2 = y

Multiply by 4:

4x - 8 = 4y

So 5x - 13 = 4x - 8.

Rearranging:

x = 5

Hence, Galvin bought 8x = 40 books.

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Keith Lincoln Lee
Keith Lincoln Lee's answer
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Hope this helps