Risa's salary to Cathy's salary is 3 : 8. If Risa spends
27 of her salary, Cathy will have $2050 more than her. How much salary does Risa have?
| |
Risa |
Cathy |
Comparing Risa
and Cathy at first |
3x7 =
21 u |
8x7 =
56 u |
Before |
7x3 =
21 u |
|
Change |
- 2x3 =
- 6 u |
|
After |
5x3 =
15 u |
56 u |
Comparing Risa
and Cathy in the end |
|
$2050 more |
Risa's salary at first is repeated. Make Risa's salary at first the same. LCM of 3 and 7 is 21.
Amount that Cathy will have more than Risa in the end
= 56 u - 15 u
= 41 u
41 u = 2050
1 u = 2050 ÷ 41 = 50
Risa's salary
= 21 u
= 21 x 50
= $1050
Answer(s): $1050
