After using
45 of her bread flour, Mrs Sher bought another 15 kg of bread flour. As a result, Mrs Sher now has
65 as much bread flour as what she had at first. How many kilograms of bread flour did Mrs Sher have at first?
|
Bread Flour |
Total |
Before |
5 u |
5 u |
Change 1 |
- 1 u |
|
After 1 |
1 u |
|
Change 2 |
+ 15 |
|
After 2 |
1 u + 15 |
6 u |
Fraction of bread flour left after using
45 of it
= 1 -
45 =
15 Amount of bread flour left after using some = 1 u
Amount of bread flour after buying 15 kg of bread flour = 1 u + 15
1 u + 15 = 6 u
6 u - 1 u = 15
5 u = 15
1 u = 15 ÷ 5 = 3
Amount of bread flour that Mrs Sher had at first
= 5 u
= 5 x 3
= 15 kg
Answer(s): 15 kg