SOLUTION: Mr. C can invest one sum of money at 7% and a second sum @ 10% and get $640 per year. If he invests his first sum at 10% and the second @ 7% he will make $550 per year. How much
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Question 28376: Mr. C can invest one sum of money at 7% and a second sum @ 10% and get $640 per year. If he invests his first sum at 10% and the second @ 7% he will make $550 per year. How much is he going to invest in the separate accounts? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
multiply both sides of each equation by 100
multiply both sides of the 2nd equation by 7/10
subtract from the 1st equation
substitute in the 1st equation
these are the amounts to be invested in dollars
