Tammy and Emma had equal amount of money. Each day, Tammy spent $8 and Emma spent $13. When Tammy had $90 left, Emma had
12 as much money left as Tammy. How much money did the two girls have at first?
| |
Tammy |
Emma |
| Before |
8 u + 90 |
13 u + 45 |
| Change |
- 8 u |
- 13 u |
| After |
$90 |
$45 |
Amount that Emma had left
=
12 x 90
= $45
The amount that Tammy and Emma had at first is the same.
13 u + 45 = 8 u + 90
13 u - 8 u = 90 - 45
5 u = 45
1 u = 45 ÷ 5 = 9
Amount that Tammy had at first
= 8 u + 90
= 8 x 9 + 90
= 72 + 90
= $162
Total amount that both girls had at first
= 2 x 162
= $324
Answer(s): $324
