After using
34 of her sugar, Mrs Chua bought another 15 kg of sugar. As a result, Mrs Chua now has
64 as much sugar as what she had at first. How many kilograms of sugar did Mrs Chua have at first?
| |
Sugar |
Total |
| Before |
4 u |
4 u |
| Change 1 |
- 1 u |
|
| After 1 |
1 u |
|
| Change 2 |
+ 15 |
|
| After 2 |
1 u + 15 |
6 u |
Fraction of sugar left after using
34 of it
= 1 -
34 =
14 Amount of sugar left after using some = 1 u
Amount of sugar after buying 15 kg of sugar = 1 u + 15
1 u + 15 = 6 u
6 u - 1 u = 15
5 u = 15
1 u = 15 ÷ 5 = 3
Amount of sugar that Mrs Chua had at first
= 4 u
= 4 x 3
= 12 kg
Answer(s): 12 kg
