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2008-03-31 6:22 am
58.5%x=3000(精確到10)

100+100*x=102.25

2[x+(x+2.5)]=60
更新1:

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回答 (2)

2008-04-01 5:24 am
✔ 最佳答案
1)58.5%x=3000

58.5%*x=3000

58.5%*x/58.5%=3000/58.5%

X=5128

2)100*(1+x)=102.25

100*1+100x=102.25

100+100x=102.25

100+100x-100=102.25-100

100x=2.25

100x/100=2.25/100

x=0.0225/2.25%

3)2[x+(x+2.5)]=60

2(x+x+2.5)=60

4x+5=60

4x+5-5=60-5

4x=55

4x/4=55/4

x=13.75
參考: teacher
2008-03-31 7:03 am
1)58.5%x=3000(精確到10)
X=5128

2)100*(1+x)=102.25
x=0.0225=2.25%

3)60/2.5x+1+1/2=60/x.
x=24
所以24*2.5=60


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