Tiffany bought four times as many tarts as Japheth. After Tiffany ate 3 tarts, she had 12 more tarts than Japheth. How many tarts did they buy altogether?
| |
Tiffany |
Japheth |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
- 3 |
|
|
| After |
4 u - 3 |
1 u |
|
The number of tarts that Japheth had remains unchanged.
If Japheth had another 12 tarts in the end, the number of tarts that Tiffany and Japheth had would be the same.
4 u - 3 = 1 u + 12
4 u - 1 u = 12 + 3
3 u = 15
1 u = 15 ÷ 3 = 5
Total number of tarts
= 4 u + 1 u
= 5 u
= 5 x 5
= 25
Answer(s): 25
