求數學方程(10點)

2013-10-14 9:44 pm
4b-2(b-6)=5

回答 (4)

2013-10-14 10:07 pm
✔ 最佳答案
4b-2(b-6)=5
4b-2b+12=5
2b=-7
b=-3.5
steps ended,just this simple ><

2013-10-14 14:08:32 補充:
oh,hi,Masterijk,I cant see you answering,sorry!!!

2013-10-14 14:40:55 補充:
what??? are U crazy???U dont need to do so......>

2013-10-14 16:30:16 補充:
haha,byebyelu,if you want to contact me,pls email me becuz today my commenting co tar is full....

2013-10-15 00:01:14 補充:
just kidding mah
2013-10-19 4:51 am
4b-2(b-6)=5

第一步→將b-6乘以-2【括號:也解作乘的意思】
4b-2(b)-2(-6)=5

第二步→因為負負得正,所以-2乘-6,等於+12
4b-2b+12=5

第三步→同類項加減,由於4b和2b都有b,可作減
2b+12=5

第四步→將12調去右方,12和5都係數字
2b=5-12

第五步→將5減去12後,得出為-7
2b=-7

(最後一步)第六步→將-7/2【無需理會b,分子為-7、分母為2】
b=-3.5 或 -3又2份之1(帶分數表示)
2013-10-17 5:27 am
4b-2(b-6)=5
4b-2b+12=5
2b=-7
b=............................................
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b=-3.5 !!!!!
so easy!!!!!
你讀中二???
參考: me !!!!!
2013-10-14 10:12 pm
無問題~
我會刪答案~

應該要把機會給大眾~

加油!

☆ヾ(◕‿◕)ノ

2013-10-14 14:12:53 補充:
注意未知數是 b。

4b - 2 (b - 6) = 5  題目

4b - (2b - 12) = 5  處理乘2

4b - 2b + 12 = 5  拆括號,注意負負得正

2b + 12 = 5  化簡

2b = -7  兩邊減12

b = -7/2

2013-10-14 14:45:28 補充:
No worry~
Actually this is what I should do~

You should also contribute by answering some questions that you know.

(=^o^=)

2013-10-14 21:43:01 補充:
"quota" = 限額


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