Rachel's salary to Sarah's salary is 4 : 9. If Rachel spends
47 of her salary, Sarah will have $6120 more than her. How much salary does Rachel have?
| |
Rachel |
Sarah |
Comparing Rachel
and Sarah at first |
4x7 =
28 u |
9x7 =
63 u |
Before |
7x4 =
28 u |
|
Change |
- 4x4 =
- 16 u |
|
After |
3x4 =
12 u |
63 u |
Comparing Rachel
and Sarah in the end |
|
$6120 more |
Rachel's salary at first is repeated. Make Rachel's salary at first the same. LCM of 4 and 7 is 28.
Amount that Sarah will have more than Rachel in the end
= 63 u - 12 u
= 51 u
51 u = 6120
1 u = 6120 ÷ 51 = 120
Rachel's salary
= 28 u
= 28 x 120
= $3360
Answer(s): $3360
