Mrs. Wong invests a total of $8299 in two savings accounts. One account yields 8% simple interest and the other 8.5% simple interest. She earned a total of $671.86 interest for the year. How much was invested in each account?
Have a look at http://web2.0calc.com/questions/mrs-garcia-invests-a-total-of-9099-in-two-savings-accounts-one-account-yields-7-5-simple-interest-and-the-other-9-simple-interest-she and use the same method.