Rachel had 73 chocolate chip and apple cookies. After giving away
13 of her chocolate chip cookies and 13 of her apple cookies, she had an equal number of chocolate chip and apple cookies. How many apple cookies did she have at first?
| |
Chocolate Chip cookies |
Apple cookies |
Total |
| Before |
3 u |
2 u + 13 |
73 |
| Change |
- 1 u |
- 13 |
|
| After |
2 u |
2 u |
|
Fraction of the chocolate chip cookies left
= 1 -
13=
23 The number of chocolate chip and apple cookies in the end is the same.
Total number of cookies at first
= 3 u + 2 u + 13
= 5 u + 13
5 u + 13 = 73
5 u = 73 - 13
5 u = 60
1 u = 60 ÷ 5 = 12
Number of apple cookies at first
= 2 u + 13
= 2 x 12 + 13
= 24 + 13
= 37
Answer(s): 37
