Question: Solve please Phyllis invested 42000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of

Solve please

Phyllis invested 42000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 7 percent per year. After one year the total interest earned on these investments was 2580 dollars. How much money did she invest at each rate? At rate 4 percent : At rate 7 percent

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