Xandra and Wendy had $28 at first. Xandra spent
38 of her money and Wendy spent
34 of her money. Given that they had $49 left, how much did Xandra have at first?
| |
Xandra |
Wendy |
Total |
| Before |
8 u |
4 p |
$28 |
| Change |
- 3 u |
- 3 p |
|
| After |
5 u |
1 p |
$49 |
8 u + 4 p = 28 --- (1)
5 u + 1 p = 49 --- (2)
(2) x 4 20 u + 4 p = 196 --- (3)
(3) - (1)
20 u - 8 u = 196 - 28
12 u = 168
1 u = 168 ÷ 12 = 14
Amount that Xandra had at first
= 8 u
= 8 x 14
= $112
Answer(s): $112
