Emily and Xuan had $144 at first. Emily spent
58 of her money and Xuan spent
34 of her money. Given that they had $55 left, how much did Emily have at first?
| |
Emily |
Xuan |
Total |
| Before |
8 u |
4 p |
$144 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$55 |
8 u + 4 p = 144 --- (1)
3 u + 1 p = 55 --- (2)
(2) x 4 12 u + 4 p = 220 --- (3)
(3) - (1)
12 u - 8 u = 220 - 144
4 u = 76
1 u = 76 ÷ 4 = 19
Amount that Emily had at first
= 8 u
= 8 x 19
= $152
Answer(s): $152
