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A Man Invests a Total Of $21,000\$ 21,000 In Two Accounts, One Paying

Question 31

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A man invests a total of $21,000\$ 21,000 in two accounts, one paying 5.5%5.5 \% simple interest per year and the other paying 8.5%8.5 \% simple interest per year. His annual interest from both accounts is $1,280\$ 1,280 . How much did he invest at each rate?

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