After using
37 of her bread flour, Mrs Ang bought another 28 kg of bread flour. As a result, Mrs Ang now has
87 as much bread flour as what she had at first. How many kilograms of bread flour did Mrs Ang have at first?
| |
Bread Flour |
Total |
| Before |
7 u |
7 u |
| Change 1 |
- 1 u |
|
| After 1 |
4 u |
|
| Change 2 |
+ 28 |
|
| After 2 |
4 u + 28 |
8 u |
Fraction of bread flour left after using
37 of it
= 1 -
37 =
47 Amount of bread flour left after using some = 4 u
Amount of bread flour after buying 28 kg of bread flour = 4 u + 28
4 u + 28 = 8 u
8 u - 4 u = 28
4 u = 28
1 u = 28 ÷ 4 = 7
Amount of bread flour that Mrs Ang had at first
= 7 u
= 7 x 7
= 49 kg
Answer(s): 49 kg
