Usha had 52 apple and blueberry cookies. After giving away
13 of her apple cookies and 17 of her blueberry cookies, she had an equal number of apple and blueberry cookies. How many blueberry cookies did she have at first?
| |
Apple cookies |
Blueberry cookies |
Total |
| Before |
3 u |
2 u + 17 |
52 |
| Change |
- 1 u |
- 17 |
|
| After |
2 u |
2 u |
|
Fraction of the apple cookies left
= 1 -
13=
23 The number of apple and blueberry cookies in the end is the same.
Total number of cookies at first
= 3 u + 2 u + 17
= 5 u + 17
5 u + 17 = 52
5 u = 52 - 17
5 u = 35
1 u = 35 ÷ 5 = 7
Number of blueberry cookies at first
= 2 u + 17
= 2 x 7 + 17
= 14 + 17
= 31
Answer(s): 31
