After using
59 of her chicken powder, Mrs Peh bought another 21 kg of chicken powder. As a result, Mrs Peh now has
119 as much chicken powder as what she had at first. How many kilograms of chicken powder did Mrs Peh have at first?
| |
Chicken Powder |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
4 u |
|
| Change 2 |
+ 21 |
|
| After 2 |
4 u + 21 |
11 u |
Fraction of chicken powder left after using
59 of it
= 1 -
59 =
49 Amount of chicken powder left after using some = 4 u
Amount of chicken powder after buying 21 kg of chicken powder = 4 u + 21
4 u + 21 = 11 u
11 u - 4 u = 21
7 u = 21
1 u = 21 ÷ 7 = 3
Amount of chicken powder that Mrs Peh had at first
= 9 u
= 9 x 3
= 27 kg
Answer(s): 27 kg
