Eva bought thrice as many shortbreads as Oscar. After Eva ate 4 shortbreads, she had 12 more shortbreads than Oscar. How many shortbreads did they buy altogether?
| |
Eva |
Oscar |
Total |
| Before |
3 u |
1 u |
4 u |
| Change |
- 4 |
|
|
| After |
3 u - 4 |
1 u |
|
The number of shortbreads that Oscar had remains unchanged.
If Oscar had another 12 shortbreads in the end, the number of shortbreads that Eva and Oscar had would be the same.
3 u - 4 = 1 u + 12
3 u - 1 u = 12 + 4
2 u = 16
1 u = 16 ÷ 2 = 8
Total number of shortbreads
= 3 u + 1 u
= 4 u
= 4 x 8
= 32
Answer(s): 32
