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[VIC] 有一题请各位大侠帮忙! [复制链接]

发表于 2019-4-14 10:10 |显示全部楼层
此文章由 bill-bill 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 bill-bill 所有!转贴必须注明作者、出处和本声明,并保持内容完整
lily and briony work together selling computers during the school holidays
briony receives a wage of $20 per hour plus a week plus a commission of 5% of the sales of computers that she sells .lily receives a wage of $15 per hour plus a week plus a commission of 7.5% of the sales of computers that she sells .
1.in the first week of the holidays,both lily and briony work for 15 hour during the holidays and briony earnt 20% more than
lily. use an equation to determine the amount$ of computers that each gril sold .write your answer correct to the nearest cent

谢谢
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发表于 2019-4-14 19:25 来自手机 |显示全部楼层
此文章由 james988 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 james988 所有!转贴必须注明作者、出处和本声明,并保持内容完整
briony receives a wage of $20 per hour <strong>plus a week </strong>plus a commission of 5% of the sales of computers that she sells
Plus a week哈意思?

发表于 2019-4-14 22:46 |显示全部楼层
此文章由 bill-bill 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 bill-bill 所有!转贴必须注明作者、出处和本声明,并保持内容完整
james988 发表于 2019-4-14 18:25
briony receives a wage of $20 per hour plus a week plus a commission of 5% of the sales of computers ...

就是不知道呢,原题是这样的

发表于 2019-4-15 16:21 |显示全部楼层
此文章由 act_nan 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 act_nan 所有!转贴必须注明作者、出处和本声明,并保持内容完整
20*15+5%*X = (15*15+7.5%*Y)*(1+20%)

发表于 2019-4-18 12:28 |显示全部楼层
此文章由 Angelp909 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 Angelp909 所有!转贴必须注明作者、出处和本声明,并保持内容完整
Set X as $ of Computer sold:
Lili: 15X15 + 0.075X=225+0.075X
Briony: 20X15 + 0.05X=300 + 0.05X
(300+0.05X)-(225+0.075X)=0.2(225+0.075X)
75-0.025X=45+0.015X
X=30/0.04=750

发表于 2019-4-23 21:38 |显示全部楼层
此文章由 bill-bill 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 bill-bill 所有!转贴必须注明作者、出处和本声明,并保持内容完整
Angelp909 发表于 2019-4-18 11:28
Set X as $ of Computer sold:
Lili: 15X15 + 0.075X=225+0.075X
Briony: 20X15 + 0.05X=300 + 0.05X

谢谢
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