Linda and Nora had $132 at first. Linda spent
57 of her money and Nora spent
45 of her money. Given that they had $81 left, how much did Linda have at first?
|
Linda |
Nora |
Total |
Before |
7 u |
5 p |
$132 |
Change |
- 5 u |
- 4 p |
|
After |
2 u |
1 p |
$81 |
7 u + 5 p = 132 --- (1)
2 u + 1 p = 81 --- (2)
(2) x 5 10 u + 5 p = 405 --- (3)
(3) - (1)
10 u - 7 u = 405 - 132
3 u = 273
1 u = 273 ÷ 3 = 91
Amount that Linda had at first
= 7 u
= 7 x 91
= $637
Answer(s): $637