Betty bought five times as many shortbreads as Bobby. After Betty ate 6 shortbreads, she had 10 more shortbreads than Bobby. How many shortbreads did they buy altogether?
| |
Betty |
Bobby |
Total |
| Before |
5 u |
1 u |
6 u |
| Change |
- 6 |
|
|
| After |
5 u - 6 |
1 u |
|
The number of shortbreads that Bobby had remains unchanged.
If Bobby had another 10 shortbreads in the end, the number of shortbreads that Betty and Bobby had would be the same.
5 u - 6 = 1 u + 10
5 u - 1 u = 10 + 6
4 u = 16
1 u = 16 ÷ 4 = 4
Total number of shortbreads
= 5 u + 1 u
= 6 u
= 6 x 4
= 24
Answer(s): 24
