Yen and Jen had equal amount of money. Each day, Yen spent $5 and Jen spent $8. When Yen had $90 left, Jen had
15 as much money left as Yen. How much money did the two girls have at first?
| |
Yen |
Jen |
| Before |
5 u + 90 |
8 u + 18 |
| Change |
- 5 u |
- 8 u |
| After |
$90 |
$18 |
Amount that Jen had left
=
15 x 90
= $18
The amount that Yen and Jen had at first is the same.
8 u + 18 = 5 u + 90
8 u - 5 u = 90 - 18
3 u = 72
1 u = 72 ÷ 3 = 24
Amount that Yen had at first
= 5 u + 90
= 5 x 24 + 90
= 120 + 90
= $210
Total amount that both girls had at first
= 2 x 210
= $420
Answer(s): $420
