After using
19 of her pepper, Mrs Heng bought another 18 kg of pepper. As a result, Mrs Heng now has
119 as much pepper as what she had at first. How many kilograms of pepper did Mrs Heng have at first?
| |
Pepper |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
8 u |
|
| Change 2 |
+ 18 |
|
| After 2 |
8 u + 18 |
11 u |
Fraction of pepper left after using
19 of it
= 1 -
19 =
89 Amount of pepper left after using some = 8 u
Amount of pepper after buying 18 kg of pepper = 8 u + 18
8 u + 18 = 11 u
11 u - 8 u = 18
3 u = 18
1 u = 18 ÷ 3 = 6
Amount of pepper that Mrs Heng had at first
= 9 u
= 9 x 6
= 54 kg
Answer(s): 54 kg
