問數學1條....(急!!)

2007-05-10 4:44 am

2p+30=3p-40 咁p係咩??

回答 (8)

2007-05-10 4:46 am

✔ 最佳答案

30+40=3p-2p
p=70

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2007-05-11 7:14 am

70.............

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2007-05-10 5:40 am

2p+30=3p-40
30+40=3p-2p
70 =p
p = 70

參考: me

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2007-05-10 5:19 am

2p+30=3p-40

2p+30-2p=3p-40-2p

30=p-40

30+40=p-40+40

70=p

p=70

.'.p=70

參考: mememe

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2007-05-10 4:56 am

咁簡單﹐
問黎把鬼?
p=70 囉!!!!!
無任何step,心算﹐幾秒鐘計完!!!!!!!!!
(sor,語氣重左D﹐玩下咋!!!!!唔好發脾氣)

參考: 我個腦的10%+幾秒鐘

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2007-05-10 4:52 am

2P+30=3P-40
2P+30-3P=-40
-P+30=-40
-P=-40-30
-P=-70
P=70

參考: 自己

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2007-05-10 4:49 am

2p+30=3p-40

2p-3p=-40-30

-p=-70

p=70//

參考: 自己~

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2007-05-10 4:48 am

2p+30=3p-40

30=3p-40-2p
30+40=3p-2p
so p=70

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