After using
19 of her chilli powder, Mrs Ee bought another 20 kg of chilli powder. As a result, Mrs Ee now has
129 as much chilli powder as what she had at first. How many kilograms of chilli powder did Mrs Ee have at first?
| |
Chilli Powder |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
8 u |
|
| Change 2 |
+ 20 |
|
| After 2 |
8 u + 20 |
12 u |
Fraction of chilli powder left after using
19 of it
= 1 -
19 =
89 Amount of chilli powder left after using some = 8 u
Amount of chilli powder after buying 20 kg of chilli powder = 8 u + 20
8 u + 20 = 12 u
12 u - 8 u = 20
4 u = 20
1 u = 20 ÷ 4 = 5
Amount of chilli powder that Mrs Ee had at first
= 9 u
= 9 x 5
= 45 kg
Answer(s): 45 kg
