Kimberly had 10 more wafers than Betty at first. After Kimberly ate 6 wafers, she had five times as many wafers as Betty in the end. How many wafers did Betty have?
| |
Betty |
Kimberly |
| Before |
1 u |
1 u + 10 |
| Change |
|
- 6 |
| After |
1 u |
1 u + 4 |
Comparing Betty
and Kimberly in the end |
1 u |
5 u |
The number of wafers that Betty had remains unchanged.
Number of wafers that Kimberly had in the end
= 5 x 1 u
= 5 u
5 u = 1 u + 4
5 u - 1 u = 4
4 u = 4
1 u = 4 ÷ 4 = 1
Number of wafers that Betty had
= 1 u
= 1
Answer(s): 1
