SOLUTION: A total of 4000 was invested,part of it at 8% interest and the remainder at 9%. if the total yearly interest amounted to $ 350, how much was invested at each rate
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Question 342172: A total of 4000 was invested,part of it at 8% interest and the remainder at 9%. if the total yearly interest amounted to $ 350, how much was invested at each rate Answer by nyc_function(2741) (Show Source):
You can put this solution on YOUR website! let x = amount invested at 8%
let y = amount invested at 9%
x+y=4000
.08x+.09y=350
x=4000-y
.08(4000-y)+.09y=350
320-.08y+.09y=350
.01y=30
y=3000
x=1000
