SOLUTION: Mario invested part of his money at 8% per year and twice that amount at 5% per year. If the returns last year in the two investments was Php 4,200, how much did Mario invest at ea

SOLUTION: Mario invested part of his money at 8% per year and twice that amount at 5% per year. If the returns last year in the two investments was Php 4,200, how much did Mario invest at ea

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Question 1151745: Mario invested part of his money at 8% per year and twice that amount at 5% per year. If the returns last year in the two investments was Php 4,200, how much did Mario invest at each rate?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
x is the smaller amount of money and its interest is .08x
2x is the larger and its interest is 2x*.05=.10x
Their sum is .18x=4200
x=23,333.33 and 8% of that is 1866.67
2x=46,666.67 and 5% is 2333.33

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