1) In 3 consecutive numbers, the smallest number is 19/20 of the largest one, find the middle number.
2) Find 2 consecutive even numbers such that 2 times the large one plus 1/4 of the smaller one equals 49.
3) Ben earned $1500 for five days' work. The daily wage in the last 3 days was $50 more than that in the first 2 days. Find his daily wage in the first 2 days.
初中英數問題~~~~~~~~~
2007-05-05 3:26 am
回答 (2)
2007-05-05 3:39 am
✔ 最佳答案
1.let x,x+1,x+2 be that numbersx=(x+2)(19/20)
20x=19x+38
x=38
middle number=x+1=39
2.let y,y+2 be the required numbers
2(y+2)+y/4=49
y(9/4)+4=49
y(9/4)=45
y=20.....y+2=22
3.let z be his daily wage in the first 2 days...z+50 be the last three days
z+(z+50)=1500
2z=1450
z=$725
2007-05-08 4:16 am
good!
收錄日期: 2021-04-12 17:42:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070504000051KK03534