problem word ok

Question

Phyllis invested $8,500, a portion earning a simple interest rate of
6
1
4
%
per year and the rest earning a rate of 6% per year. After one year the total interest earned on these investments was $527.50. How much money did she invest at each rate?
at 6 1/4
% per year $
Incorrect: Your answer is incorrect.
at 6% per year 

Answer 1

a represents the amount at 6.25%

8500 - a represents the amount at 6%

 

0.0625a + 0.06(8500 - a) = 527.50

 

Can you solve for a and answer?