Esther had 67 vanilla and strawberry wafers. After giving away
13 of her vanilla wafers and 17 of her strawberry wafers, she had an equal number of vanilla and strawberry wafers. How many strawberry wafers did she have at first?
| |
Vanilla wafers |
Strawberry wafers |
Total |
| Before |
3 u |
2 u + 17 |
67 |
| Change |
- 1 u |
- 17 |
|
| After |
2 u |
2 u |
|
Fraction of the vanilla wafers left
= 1 -
13=
23 The number of vanilla and strawberry wafers in the end is the same.
Total number of wafers at first
= 3 u + 2 u + 17
= 5 u + 17
5 u + 17 = 67
5 u = 67 - 17
5 u = 50
1 u = 50 ÷ 5 = 10
Number of strawberry wafers at first
= 2 u + 17
= 2 x 10 + 17
= 20 + 17
= 37
Answer(s): 37
