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Irene had $$ $20,000$$ in savings. She used some of her savings to purchase a computer. Of the amount remaining, she invested $$40$$ percent at $$6$$ percent simple annual interest and the rest at $$10$$ percent simple annual interest. If Irene's income from the interest totaled $$ $1260$$ for the first year, how much of her savings did she use to purchase the computer?
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2.5.7 单利问题
2.5.7 单利问题
以上解析由 考满分老师提供。
