Cathy had 6 times as many erasers as Zoe at first. After Cathy gave 20 erasers to Zoe, they each had the same number of erasers in the end. How many erasers did Zoe have in the end?
| |
Cathy |
Zoe |
| Before |
6 u |
1 u |
| Change |
- 20 |
+ 20 |
| After |
6 u - 20 |
1 u + 20 |
Comparing Cathy and
Zoe in the end |
1 |
1 |
The number of erasers that Cathy and Zoe had in the end is equal.
6 u - 20 = 1 u + 20
6 u - 1 u = 20 + 20
5 u = 40
1 u = 8
Number of erasers that Zoe had in the end
= 1 u + 20
= 8 + 20
= 28
Answer(s): 28
