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primary 6 | Maths
| Ratio
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Date Posted: 5 years ago
Views: 2676
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.
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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Date Posted:
5 years ago
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