# SOLUTION: Phyllis invested \$ 12,000, a portion earning a simple interest rate of 4 1/2% per year and the rest earning a rate of 4% per year. After one year the total interest earned on these

Algebra ->  -> SOLUTION: Phyllis invested \$ 12,000, a portion earning a simple interest rate of 4 1/2% per year and the rest earning a rate of 4% per year. After one year the total interest earned on these      Log On

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 Click here to see ALL problems on Quadratic Equations Question 45214: Phyllis invested \$ 12,000, a portion earning a simple interest rate of 4 1/2% per year and the rest earning a rate of 4% per year. After one year the total interest earned on these investment was \$525. How much money did she invest at each rate??Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!(x*.045)+(12000-x).04=525 or .045x+480-.04x=525 or .005x=525-480 or .005x=45 or x=45/.005 or x=9000 invested @ 4.5% then 12000-9000=3000 invested @ 4% proof 9000*.045+3000*.04=525 or 405+120=525 or 525=525