GRE数学 请帮我看看Mr. Richard plans to invest $20000 in an account paying 6% interest annually. How much more must he invest at the same time at 3% so that his total annual income during the first year is 4% of his total initial investment?第
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GRE数学 请帮我看看
Mr. Richard plans to invest $20000 in an account paying 6% interest annually. How much more must he invest at the same time at 3% so that his total annual income during the first year is 4% of his total initial investment?
第二句话有些不懂
理查德先生计划投资20000美元到一个年利息6%的账户.他要是想让第一年全部投资的收益为4%,需要另投多少到一个年利息3%的账户上?
设他需要投资到3%项目的资金为x,则
20000*(1+6%)+ x*(1+3%)=(20000+ x)*(1+4%)
我算的结果是 x = 40000,对吗?
GRE数学 请帮我看看Mr. Richard plans to invest $20000 in an account paying 6% interest annually. How much more must he invest at the same time at 3% so that his total annual income during the first year is 4% of his total initial investment?第
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