Zara's salary to Xandra's salary is 3 : 7. If Zara spends
47 of her salary, she will have $800 less than Xandra. How much salary does Xandra have?
| |
Zara |
Xandra |
Comparing Zara
and Xandra at first |
3x7 =
21 u |
7x7 =
49 u |
Before |
7x3 =
21 u |
|
Change |
- 4x3 =
- 12 u |
|
After |
3x3 =
9 u |
49 u |
Comparing Zara
and Xandra in the end |
|
$800 less |
Zara's salary at first is repeated. Make Zara's salary at first the same. LCM of 3 and 7 is 21.
Amount that Zara will have less than Xandra in the end
= 49 u - 9 u
= 40 u
40 u = 800
1 u = 800 ÷ 40 = 20
Xandra's salary
= 49 u
= 49 x 20
= $980
Answer(s): $980
