Tammy had 109 chocolate chip and apple wafers. After giving away
17 of her chocolate chip wafers and 18 of her apple wafers, she had an equal number of chocolate chip and apple wafers. How many apple wafers did she have at first?
| |
Chocolate Chip wafers |
Apple wafers |
Total |
| Before |
7 u |
6 u + 18 |
109 |
| Change |
- 1 u |
- 18 |
|
| After |
6 u |
6 u |
|
Fraction of the chocolate chip wafers left
= 1 -
17=
67 The number of chocolate chip and apple wafers in the end is the same.
Total number of wafers at first
= 7 u + 6 u + 18
= 13 u + 18
13 u + 18 = 109
13 u = 109 - 18
13 u = 91
1 u = 91 ÷ 13 = 7
Number of apple wafers at first
= 6 u + 18
= 6 x 7 + 18
= 42 + 18
= 60
Answer(s): 60
