Joelle bought five times as many tarts as Jack. After Joelle ate 4 tarts, she had 8 more tarts than Jack. How many tarts did they buy altogether?
| |
Joelle |
Jack |
Total |
| Before |
5 u |
1 u |
6 u |
| Change |
- 4 |
|
|
| After |
5 u - 4 |
1 u |
|
The number of tarts that Jack had remains unchanged.
If Jack had another 8 tarts in the end, the number of tarts that Joelle and Jack had would be the same.
5 u - 4 = 1 u + 8
5 u - 1 u = 8 + 4
4 u = 12
1 u = 12 ÷ 4 = 3
Total number of tarts
= 5 u + 1 u
= 6 u
= 6 x 3
= 18
Answer(s): 18
