Betty's salary to Xandra's salary is 3 : 8. If Betty spends
47 of her salary, Xandra will have $1410 more than her. How much salary does Betty have?
| |
Betty |
Xandra |
Comparing Betty
and Xandra at first |
3x7 =
21 u |
8x7 =
56 u |
Before |
7x3 =
21 u |
|
Change |
- 4x3 =
- 12 u |
|
After |
3x3 =
9 u |
56 u |
Comparing Betty
and Xandra in the end |
|
$1410 more |
Betty's salary at first is repeated. Make Betty's salary at first the same. LCM of 3 and 7 is 21.
Amount that Xandra will have more than Betty in the end
= 56 u - 9 u
= 47 u
47 u = 1410
1 u = 1410 ÷ 47 = 30
Betty's salary
= 21 u
= 21 x 30
= $630
Answer(s): $630
