SOLUTION: Suppose you invested 10,000 dolllars, part at 6% annual interest and the rest on 9% annual interest. If you recieved 684 dollars in interest after one year, how much did you invest

Question 641380: Suppose you invested 10,000 dolllars, part at 6% annual interest and the rest on 9% annual interest. If you recieved 684 dollars in interest after one year, how much did you invest at each rate? Due tom. thanks!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Hint:

x+y = 10000

y = 10000-x

----------------------
0.06x + 0.09y = 684

6x + 9y = 68400

6x + 9(10000-x) = 68400

Now solve for x. Once you have your value of x, use it to find y.
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