Jen had 66 cherry and apple wafers. After giving away
18 of her cherry wafers and 21 of her apple wafers, she had an equal number of cherry and apple wafers. How many apple wafers did she have at first?
| |
Cherry wafers |
Apple wafers |
Total |
| Before |
8 u |
7 u + 21 |
66 |
| Change |
- 1 u |
- 21 |
|
| After |
7 u |
7 u |
|
Fraction of the cherry wafers left
= 1 -
18=
78 The number of cherry and apple wafers in the end is the same.
Total number of wafers at first
= 8 u + 7 u + 21
= 15 u + 21
15 u + 21 = 66
15 u = 66 - 21
15 u = 45
1 u = 45 ÷ 15 = 3
Number of apple wafers at first
= 7 u + 21
= 7 x 3 + 21
= 21 + 21
= 42
Answer(s): 42
