Raeann bought thrice as many shortbreads as Mark. After Raeann ate 4 shortbreads, she had 12 more shortbreads than Mark. How many shortbreads did they buy altogether?
| |
Raeann |
Mark |
Total |
| Before |
3 u |
1 u |
4 u |
| Change |
- 4 |
|
|
| After |
3 u - 4 |
1 u |
|
The number of shortbreads that Mark had remains unchanged.
If Mark had another 12 shortbreads in the end, the number of shortbreads that Raeann and Mark 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
