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英文数学题,请大家帮忙,谢谢!
aninvestorhas$7500investedatonerateand$6200investedatadifferentrate.ifthesecondinvest...
an investor has $7500 invested at one rate and $6200 invested at a different rate . if the second investment is at a rate 2% lower than the first , find the rate for each investment if his annual interest is $698.请大家写步骤!谢谢!
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解:设第二个投资利率为x则有
6200*x+7500*(x+2%)=698
解得x=4% 4%+2%=6%
第一个投资利率为6%,。。4%
if the second investment is at a rate 2% lower than the first
翻译:如果第二投资是2%的速率低于第一,应该是列成:(x+2%)
希望对你有帮助!
6200*x+7500*(x+2%)=698
解得x=4% 4%+2%=6%
第一个投资利率为6%,。。4%
if the second investment is at a rate 2% lower than the first
翻译:如果第二投资是2%的速率低于第一,应该是列成:(x+2%)
希望对你有帮助!
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