Ethan had $36 more than Tiffany. After Tiffany spent
25 of her money, Ethan had thrice as much money as Tiffany. How much money did Ethan have at first?
| |
Ethan |
Tiffany |
| Before |
9 u |
5 u |
| Change |
|
- 2 u |
| After |
9 u |
3 u |
Amount that Ethan had in the end
= 3 x 3 u
= 9 u
If Tiffany had another $36 at first, the amounts that Ethan and Tiffany each had at first will be the same.
9 u = 5 u + 36
9 u - 5 u = 36
4 u = 36
1 u = 36 ÷ 4 = 9
Amount Ethan had at first
= 9 u
= 9 x 9
= $81
Answer(s): $81
