Gillian's salary to Risa's salary is 2 : 7. If Gillian spends
25 of her salary, Risa will have $2320 more than her. How much salary does Gillian have?
| |
Gillian |
Risa |
Comparing Gillian
and Risa at first |
2x5 =
10 u |
7x5 =
35 u |
Before |
5x2 =
10 u |
|
Change |
- 2x2 =
- 4 u |
|
After |
3x2 =
6 u |
35 u |
Comparing Gillian
and Risa in the end |
|
$2320 more |
Gillian's salary at first is repeated. Make Gillian's salary at first the same. LCM of 2 and 5 is 10.
Amount that Risa will have more than Gillian in the end
= 35 u - 6 u
= 29 u
29 u = 2320
1 u = 2320 ÷ 29 = 80
Gillian's salary
= 10 u
= 10 x 80
= $800
Answer(s): $800
