After using
16 of her flour, Mrs Heng bought another 18 kg of flour. As a result, Mrs Heng now has
86 as much flour as what she had at first. How many kilograms of flour did Mrs Heng have at first?
| |
Flour |
Total |
| Before |
6 u |
6 u |
| Change 1 |
- 1 u |
|
| After 1 |
5 u |
|
| Change 2 |
+ 18 |
|
| After 2 |
5 u + 18 |
8 u |
Fraction of flour left after using
16 of it
= 1 -
16 =
56 Amount of flour left after using some = 5 u
Amount of flour after buying 18 kg of flour = 5 u + 18
5 u + 18 = 8 u
8 u - 5 u = 18
3 u = 18
1 u = 18 ÷ 3 = 6
Amount of flour that Mrs Heng had at first
= 6 u
= 6 x 6
= 36 kg
Answer(s): 36 kg
