After using
29 of her chicken powder, Mrs Gan bought another 24 kg of chicken powder. As a result, Mrs Gan now has
109 as much chicken powder as what she had at first. How many kilograms of chicken powder did Mrs Gan have at first?
| |
Chicken Powder |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
7 u |
|
| Change 2 |
+ 24 |
|
| After 2 |
7 u + 24 |
10 u |
Fraction of chicken powder left after using
29 of it
= 1 -
29 =
79 Amount of chicken powder left after using some = 7 u
Amount of chicken powder after buying 24 kg of chicken powder = 7 u + 24
7 u + 24 = 10 u
10 u - 7 u = 24
3 u = 24
1 u = 24 ÷ 3 = 8
Amount of chicken powder that Mrs Gan had at first
= 9 u
= 9 x 8
= 72 kg
Answer(s): 72 kg
