Vanessa baked 30 wafers.
35 of the wafers were vanilla wafers. The rest were cherry wafers. She gave an equal number of vanilla wafers and cherry wafers away and had 4 times as many vanilla wafers as cherry wafers left. How many wafers did she give away?
| |
Vanilla wafers |
Cherry wafers |
Difference |
| Before |
3x3 =
9 u |
2x3 =
6 u |
1x3 =
3 u |
| Change |
- 5 u |
- 5 u |
|
| After |
4x1 =
4 u |
1x1 =
1 u |
3x1 =
3 u |
Since Vanessa gave away an equal number of vanilla wafers and cherry wafers, the difference in the number of vanilla wafers and cherry wafers remains unchanged. Make the difference in the vanilla wafers and cherry wafers the same. LCM of 1 and 3 is 3.
Total number of wafers at first
= 9 u + 6 u
= 15 u
15 u = 30
1 u = 30 ÷ 15 = 2
Number of wafers that Vanessa gave away
= 5 u + 5 u
= 10 u
= 10 x 2
= 20
Answer(s): 20
