標題:
初中英數問題~~~~~~~~~
發問:
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... 顯示更多 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.
1.let x,x+1,x+2 be that numbers x=(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
其他解答:
good!
初中英數問題~~~~~~~~~
發問:
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... 顯示更多 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.
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最佳解答:1.let x,x+1,x+2 be that numbers x=(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
其他解答:
good!
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