Jean and Vanessa had $60 at first. Jean spent
47 of her money and Vanessa spent
23 of her money. Given that they had $60 left, how much did Jean have at first?
|
Jean |
Vanessa |
Total |
Before |
7 u |
3 p |
$60 |
Change |
- 4 u |
- 2 p |
|
After |
3 u |
1 p |
$60 |
7 u + 3 p = 60 --- (1)
3 u + 1 p = 60 --- (2)
(2) x 3 9 u + 3 p = 180 --- (3)
(3) - (1)
9 u - 7 u = 180 - 60
2 u = 120
1 u = 120 ÷ 2 = 60
Amount that Jean had at first
= 7 u
= 7 x 60
= $420
Answer(s): $420