Erika had 71 apple and strawberry cookies. After giving away
15 of her apple cookies and 17 of her strawberry cookies, she had an equal number of apple and strawberry cookies. How many strawberry cookies did she have at first?
| |
Apple cookies |
Strawberry cookies |
Total |
| Before |
5 u |
4 u + 17 |
71 |
| Change |
- 1 u |
- 17 |
|
| After |
4 u |
4 u |
|
Fraction of the apple cookies left
= 1 -
15=
45 The number of apple and strawberry cookies in the end is the same.
Total number of cookies at first
= 5 u + 4 u + 17
= 9 u + 17
9 u + 17 = 71
9 u = 71 - 17
9 u = 54
1 u = 54 ÷ 9 = 6
Number of strawberry cookies at first
= 4 u + 17
= 4 x 6 + 17
= 24 + 17
= 41
Answer(s): 41
