Tiffany and Zoe went shopping together. Tiffany brought four times as much money as Zoe. After Tiffany had spent $600 and Zoe had spent $120, they had an equal amount of money left. How much money did each of them have at first?
- Zoe
- Tiffany
|
Tiffany |
Zoe |
Before |
4 u |
1 u |
Change |
- $600 |
- $120 |
After |
4 u - $600 |
1 u - $120 |
(a)
The amounts that Tiffany and Zoe had in the end are the same.
4 u - 600 = 1 u - 120
4 u - 1 u = 600 - 120
3 u = 480
1 u = 480 ÷ 3 = 160
Amount that Zoe had at first
= 1 u
= $160
(b)
Amount that Tiffany had at first
= 4 u
= 4 x 160
= $640
Answer(s): (a) $160, (b) $640