问题标题:
七年级上册鲁教版数学配套练习册答案'
问题描述:
七年级上册鲁教版数学配套练习册答案'
鲍喜荣回答:
设1000元年利率为x,20000元年利率为(0.0297-x).1000x+20000(0.0297-x)=457.21000x+594-20000x=457.2-18000x=457.2-594-18000x=-136.818000x=136.8x=0.00760.0297-x=0.0297-0.0076=0.02210.0076=0.76%0.0221=2.21%...
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