Vanessa had 60 cheese and chocolate chip cookies. After giving away
13 of her cheese cookies and 15 of her chocolate chip cookies, she had an equal number of cheese and chocolate chip cookies. How many chocolate chip cookies did she have at first?
| |
Cheese cookies |
Chocolate Chip cookies |
Total |
| Before |
3 u |
2 u + 15 |
60 |
| Change |
- 1 u |
- 15 |
|
| After |
2 u |
2 u |
|
Fraction of the cheese cookies left
= 1 -
13=
23 The number of cheese and chocolate chip cookies in the end is the same.
Total number of cookies at first
= 3 u + 2 u + 15
= 5 u + 15
5 u + 15 = 60
5 u = 60 - 15
5 u = 45
1 u = 45 ÷ 5 = 9
Number of chocolate chip cookies at first
= 2 u + 15
= 2 x 9 + 15
= 18 + 15
= 33
Answer(s): 33
