Tina went shopping with thrice as much money as Lynn. After Tina spent $800, Lynn had thrice as much money as Tina had left. How much more money did Tina bring along for shopping than Lynn?
| |
Tina |
Lynn |
Difference |
| Before |
3x3 =
9 u |
1x3 =
3 u |
6 u |
| Change |
- $800 |
|
|
| After |
1 u |
3 u |
|
The amount that Lynn has remains unchanged at first and in the end. Make the amount that Lynn has the same. LCM of 1 and 3 is 3.
Amount that Tina spent
= 9 u - 1 u
= 8 u
8 u = 800
1 u = 800 ÷ 8 = 100
Amount that Tina brought along more than Lynn
= 9 u - 3 u
= 6 u
= 6 x 100
= $600
Answer(s): $600
