Tiffany and Mary had equal amount of money. Each day, Tiffany spent $11 and Mary spent $13. When Tiffany had $108 left, Mary had
56 as much money left as Tiffany. How much money did the two girls have at first?
| |
Tiffany |
Mary |
| Before |
11 u + 108 |
13 u + 90 |
| Change |
- 11 u |
- 13 u |
| After |
$108 |
$90 |
Amount that Mary had left
=
56 x 108
= $90
The amount that Tiffany and Mary had at first is the same.
13 u + 90 = 11 u + 108
13 u - 11 u = 108 - 90
2 u = 18
1 u = 18 ÷ 2 = 9
Amount that Tiffany had at first
= 11 u + 108
= 11 x 9 + 108
= 99 + 108
= $207
Total amount that both girls had at first
= 2 x 207
= $414
Answer(s): $414
