if there is x in the CD account, then the rest (5000-x) is in the bond. So, just add up the interest:
.04x + .07(5000-x) = 300
a mother wants to invest 5000 for her sons future education. She invests a portion of the money in a bank certificate of deposit which earns 4% and the remainder in a savings bond that earns 7%. If the total interest earned after one year is $300.00,how much money was invested in the CD account
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