Pamela and Min had $140 at first. Pamela spent
58 of her money and Min spent
34 of her money. Given that they had $42 left, how much did Pamela have at first?
| |
Pamela |
Min |
Total |
| Before |
8 u |
4 p |
$140 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$42 |
8 u + 4 p = 140 --- (1)
3 u + 1 p = 42 --- (2)
(2) x 4 12 u + 4 p = 168 --- (3)
(3) - (1)
12 u - 8 u = 168 - 140
4 u = 28
1 u = 28 ÷ 4 = 7
Amount that Pamela had at first
= 8 u
= 8 x 7
= $56
Answer(s): $56
