SOLUTION: john invested 4000 for a year, part at 7% per annum and part at 9% per annum. the interest on the investment is 300. how much did john invest at each rate
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Question 1163145: john invested 4000 for a year, part at 7% per annum and part at 9% per annum. the interest on the investment is 300. how much did john invest at each rate
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
john invested 4000 for a year, part at 7% per annum and part at 9% per annum. the interest on the investment is 300. how much did john invest at each rate
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A = amount at 7%
A*0.07 + (4000 - A)*0.09 = 300
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