標題:
Maths 方程達人請入
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發問:
以下方程不太懂,幫幫忙 NO1: 2(6+p)+7p=3 No.2: 5(4-r)-2(3r+10)=22 NO3: 4[15+10(m-1)]=80-25m
最佳解答:
NO1: 2(6+p)+7p=3 12+2p+7p = 3 9p = -9 p = -1 No.2: 5(4-r)-2(3r+10)=22 20 - 5r - 6r - 20 = 22 11r = - 22 r = -2 NO3: 4[15+10(m-1)]=80-25m 60 + 40(m-1) = 80 - 25m 60 + 40m - 40 = 80 - 25m 65m = 80+40-60 65m = 60 m = 12/13 2011-10-20 22:06:25 補充： I think and do at the same time ^_^ That's the way
其他解答:
1. 2(6+p)+7p=3 12+2p+7p=3 9p=-9 p=-1 2. 5(4-r)-2(3r+10)=22 20-5r-6r-20=22 -11r=22 r=-2 3. 4[15+10(m-1)]=80-25m 4(15+10m-10)=80-25m 4(5+10m)=80-25m 20+40m=80-25m 65m=60 m=60/65 m=12/13|||||匿名 , I want to ask how could you answer these three question so fast ! You only used maximum 114 seconds ! ( But I don't think you could see the question when the questioner ask that and you may saw it after he asked for ten or twenty or even forty seconds ) 2011-10-20 22:05:17 補充： I think I need 3 mins to do them inlude the time I press the button , read the question ....
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