Eva and Xuan had $94 at first. Eva spent
57 of her money and Xuan spent
56 of her money. Given that they had $39 left, how much did Eva have at first?
| |
Eva |
Xuan |
Total |
| Before |
7 u |
6 p |
$94 |
| Change |
- 5 u |
- 5 p |
|
| After |
2 u |
1 p |
$39 |
7 u + 6 p = 94 --- (1)
2 u + 1 p = 39 --- (2)
(2) x 6 12 u + 6 p = 234 --- (3)
(3) - (1)
12 u - 7 u = 234 - 94
5 u = 140
1 u = 140 ÷ 5 = 28
Amount that Eva had at first
= 7 u
= 7 x 28
= $196
Answer(s): $196
