Tiffany's salary to Xylia's salary is 3 : 7. If Tiffany spends
57 of her salary, Xylia will have $3870 more than her. How much salary does Tiffany have?
| |
Tiffany |
Xylia |
Comparing Tiffany
and Xylia at first |
3x7 =
21 u |
7x7 =
49 u |
Before |
7x3 =
21 u |
|
Change |
- 5x3 =
- 15 u |
|
After |
2x3 =
6 u |
49 u |
Comparing Tiffany
and Xylia in the end |
|
$3870 more |
Tiffany's salary at first is repeated. Make Tiffany's salary at first the same. LCM of 3 and 7 is 21.
Amount that Xylia will have more than Tiffany in the end
= 49 u - 6 u
= 43 u
43 u = 3870
1 u = 3870 ÷ 43 = 90
Tiffany's salary
= 21 u
= 21 x 90
= $1890
Answer(s): $1890
