Min and Tiffany had $56 at first. Min spent
58 of her money and Tiffany spent
34 of her money. Given that they had $92 left, how much did Min have at first?
| |
Min |
Tiffany |
Total |
| Before |
8 u |
4 p |
$56 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$92 |
8 u + 4 p = 56 --- (1)
3 u + 1 p = 92 --- (2)
(2) x 4 12 u + 4 p = 368 --- (3)
(3) - (1)
12 u - 8 u = 368 - 56
4 u = 312
1 u = 312 ÷ 4 = 78
Amount that Min had at first
= 8 u
= 8 x 78
= $624
Answer(s): $624
