Usha's salary is 10% less than Xuan's salary. When their salaries are increased by 80%, their combined salaries will be $10260. How much was Xuan's salary before the increase?
| |
Usha |
Xuan |
Total |
| Before |
9 u |
10 u |
19 u |
| Change |
+ ? |
+ ? |
+ 15.2 u |
| After |
? |
? |
34.2 u
$$(n11040 |
100% - 10% = 90%
UshaXuan =
90100 =
910 Combined salaries at first
= 9 u + 10 u
= 19 u
Increase in the combined salaries
= 80% x 19 u
=
80100 x 19 u
= 15.2 u
Combined salaries in the end
= 19 u + 15.2 u
= 34.2 u
34.2 u = 10260
1 u = 10260 ÷ 34.2 = 300
Xuan's salary before the increase
= 10 u
= 10 x 300
= $3000
Answer: $3000
