After using
16 of her sugar, Mrs Heng bought another 28 kg of sugar. As a result, Mrs Heng now has
96 as much sugar as what she had at first. How many kilograms of sugar did Mrs Heng have at first?
| |
Sugar |
Total |
| Before |
6 u |
6 u |
| Change 1 |
- 1 u |
|
| After 1 |
5 u |
|
| Change 2 |
+ 28 |
|
| After 2 |
5 u + 28 |
9 u |
Fraction of sugar left after using
16 of it
= 1 -
16 =
56 Amount of sugar left after using some = 5 u
Amount of sugar after buying 28 kg of sugar = 5 u + 28
5 u + 28 = 9 u
9 u - 5 u = 28
4 u = 28
1 u = 28 ÷ 4 = 7
Amount of sugar that Mrs Heng had at first
= 6 u
= 6 x 7
= 42 kg
Answer(s): 42 kg
