SOLUTION: A MAN HAD 1000 to invest. He invested some money in an account earning 5% interest and the rest in an account earning 8% interest. If he earned $71 on the two accounts combined, ho

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Question 315123: A MAN HAD 1000 to invest. He invested some money in an account earning 5% interest and the rest in an account earning 8% interest. If he earned $71 on the two accounts combined, how much did he invest at each amount?
Answer by malaydassharma(59) About Me  (Show Source):
You can put this solution on YOUR website!
Let the man invested $x @ 5% and $y @8%. Then,

x%2By=1000
5x%2F100+%2B+8y%2F100=71

Solved by pluggable solver: Linear System solver (using determinant)
Solve:


Any system of equations:


has solution

or



(x=300, y=700}