Gillian and Ivory had $140 at first. Gillian spent
37 of her money and Ivory spent
45 of her money. Given that they had $67 left, how much did Gillian have at first?
|
Gillian |
Ivory |
Total |
Before |
7 u |
5 p |
$140 |
Change |
- 3 u |
- 4 p |
|
After |
4 u |
1 p |
$67 |
7 u + 5 p = 140 --- (1)
4 u + 1 p = 67 --- (2)
(2) x 5 20 u + 5 p = 335 --- (3)
(3) - (1)
20 u - 7 u = 335 - 140
13 u = 195
1 u = 195 ÷ 13 = 15
Amount that Gillian had at first
= 7 u
= 7 x 15
= $105
Answer(s): $105