Emma and Xylia had $28 at first. Emma spent
58 of her money and Xylia spent
34 of her money. Given that they had $20 left, how much did Emma have at first?
|
Emma |
Xylia |
Total |
Before |
8 u |
4 p |
$28 |
Change |
- 5 u |
- 3 p |
|
After |
3 u |
1 p |
$20 |
8 u + 4 p = 28 --- (1)
3 u + 1 p = 20 --- (2)
(2) x 4 12 u + 4 p = 80 --- (3)
(3) - (1)
12 u - 8 u = 80 - 28
4 u = 52
1 u = 52 ÷ 4 = 13
Amount that Emma had at first
= 8 u
= 8 x 13
= $104
Answer(s): $104