b*25%+2= b=?

2010-05-23 7:35 pm

b*25%+2= b=?

回答 (8)

2010-05-23 8:05 pm

✔ 最佳答案

b x 25% + 2 = b

0.25b + 2 = b

2 = b - 0.25b

0.75b = 2

b = 2又(2/3)

參考: fooks

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2010-05-24 2:48 am

25%b+2=b
-75%b =-2
b =8/3

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2010-05-24 12:11 am

b*25%+2=b

b*0.25=-2

b=-2/0.25

b=-8

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2010-05-23 10:30 pm

解：b×25%+2=0
b×25%=-2
b=-8

解：b×25%+2=b
2=b×75%
b=3/8
either one.

2010-05-23 14:31:29 補充：
解2中，b=8/3，打錯。

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2010-05-23 10:27 pm

b*25%+2=b
0.25b+2=b
0.25b-b=-2
-0.75b=-2
b=-2/-0.75
b=8/3

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2010-05-23 9:12 pm

b*25%+2= b=?
b*25%+2=b
b*0.25+2=b
2.25=b

b*25%+2=0
b*0.25+2=0
b*0.25=-8
b=-32

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2010-05-23 8:41 pm

b*25%+2=b
b*0.25+2=b
2.25=b

b*25%+2=0
b*0.25+2=0
b*0.25=-8
b=-32

參考: 個人回答,本人中一(答對率高)

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2010-05-23 7:47 pm

b*25%+2=0
b*25% =-2
0.25b =-2
b =2/0.25
b =8

The answer is 8

參考: myself

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