After using
49 of her pepper, Mrs Chiam bought another 18 kg of pepper. As a result, Mrs Chiam now has
119 as much pepper as what she had at first. How many kilograms of pepper did Mrs Chiam have at first?
| |
Pepper |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
5 u |
|
| Change 2 |
+ 18 |
|
| After 2 |
5 u + 18 |
11 u |
Fraction of pepper left after using
49 of it
= 1 -
49 =
59 Amount of pepper left after using some = 5 u
Amount of pepper after buying 18 kg of pepper = 5 u + 18
5 u + 18 = 11 u
11 u - 5 u = 18
6 u = 18
1 u = 18 ÷ 6 = 3
Amount of pepper that Mrs Chiam had at first
= 9 u
= 9 x 3
= 27 kg
Answer(s): 27 kg
