Emily's salary to Xuan's salary is 3 : 8. If Emily spends
25 of her salary, she will have $3720 less than Xuan. How much salary does Xuan have?
| |
Emily |
Xuan |
Comparing Emily
and Xuan at first |
3x5 =
15 u |
8x5 =
40 u |
Before |
5x3 =
15 u |
|
Change |
- 2x3 =
- 6 u |
|
After |
3x3 =
9 u |
40 u |
Comparing Emily
and Xuan in the end |
|
$3720 less |
Emily's salary at first is repeated. Make Emily's salary at first the same. LCM of 3 and 5 is 15.
Amount that Emily will have less than Xuan in the end
= 40 u - 9 u
= 31 u
31 u = 3720
1 u = 3720 ÷ 31 = 120
Xuan's salary
= 40 u
= 40 x 120
= $4800
Answer(s): $4800
