Zoe and Emily had equal amount of money. Each day, Zoe spent $14 and Emily spent $16. When Zoe had $99 left, Emily had
911 as much money left as Zoe. How much money did the two girls have at first?
| |
Zoe |
Emily |
| Before |
14 u + 99 |
16 u + 81 |
| Change |
- 14 u |
- 16 u |
| After |
$99 |
$81 |
Amount that Emily had left
=
911 x 99
= $81
The amount that Zoe and Emily had at first is the same.
16 u + 81 = 14 u + 99
16 u - 14 u = 99 - 81
2 u = 18
1 u = 18 ÷ 2 = 9
Amount that Zoe had at first
= 14 u + 99
= 14 x 9 + 99
= 126 + 99
= $225
Total amount that both girls had at first
= 2 x 225
= $450
Answer(s): $450
