Irene had 12 more wafers than Zoe at first. After Irene ate 6 wafers, she had four times as many wafers as Zoe in the end. How many wafers did Zoe have?
| |
Zoe |
Irene |
| Before |
1 u |
1 u + 12 |
| Change |
|
- 6 |
| After |
1 u |
1 u + 6 |
Comparing Zoe
and Irene in the end |
1 u |
4 u |
The number of wafers that Zoe had remains unchanged.
Number of wafers that Irene had in the end
= 4 x 1 u
= 4 u
4 u = 1 u + 6
4 u - 1 u = 6
3 u = 6
1 u = 6 ÷ 3 = 2
Number of wafers that Zoe had
= 1 u
= 2
Answer(s): 2
