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OpenStudy (anonymous):
mr.joyce invested $25000, part at 4% and the remainder at 7%. the total income he received at the end of the year was $1450. how much did he invest at each rate?
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OpenStudy (anonymous):
let us suppose he invested $ x @ 4% rate then he has invested $(25000-x) @ 7% rate 4% of $ x + 7% of $(25000-x) = $ 1450 solve for x
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