SOLUTION: (b) Ana has invested a total of $8,400 in two accounts. Account A pays interest at the rate of 5% per year, while account B pays interest at the rate of 6.5% per year. The total

Question 726507: (b) Ana has invested a total of $8,400 in two accounts. Account A pays interest at the rate of 5% per year, while account B pays interest at the rate of 6.5% per year. The total interest after one year (adding the interest earned by both accounts) was $517.50. Determine how much was invested in each account.
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
.065x+.05(8400-x)=517.50
.065x+420-.05x=517.50
.015x=517.50-420
.015x=97.50
x=97.50/.015
x=6500 invested @ 6.5%
8400-6500=1900 invested @ 5%
Proof:
.065*6500+.05*1900=517.50
422.50+95=517.50
517.50=517.50

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