2（x- 2x-3/4) = -1/6 + 2x
2乘以開括號x減4分之2x減3等於6分之-1加2x
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p.6-f.1方程數學題一問
2013-08-12 9:40 pm
回答 (3)
2013-08-12 9:57 pm
✔ 最佳答案
2（x- (2x-3)/4) = -1/6 + 2x2x-(4x-6)/4 = -1/6 + 2x
(-4x+6)/4 = -1/6
-4x+6 = -2/3
-4x = -20/3
x= 5/3
2013-08-13 8:46 pm
I am not so sure which case are you saying:
Case1:
2[x-2x-(3/4)] = (-1/6) + 2x
2[-x-(3/4)]-2x=(-1/6)
-2x-(3/2)-2x=(-1/6)
-4x=(-1/6)+(3/2)
-4x=(4/3)
x=-(1/3)
Case2:
2{x-[(2x-3)/4]}=(-1/6)+2x
x-[(2x-3)/4]=[(-1/6)+2x]/2
(-2x+3)/4=[(-1/12)+x]-x
-2x+3=4(-1/12)
-2x=(-1/3)-3
x=(-10/3)/-2
x=10/6
x=5/3
But I think you are asking the second one!
Case1:
2[x-2x-(3/4)] = (-1/6) + 2x
2[-x-(3/4)]-2x=(-1/6)
-2x-(3/2)-2x=(-1/6)
-4x=(-1/6)+(3/2)
-4x=(4/3)
x=-(1/3)
Case2:
2{x-[(2x-3)/4]}=(-1/6)+2x
x-[(2x-3)/4]=[(-1/6)+2x]/2
(-2x+3)/4=[(-1/12)+x]-x
-2x+3=4(-1/12)
-2x=(-1/3)-3
x=(-10/3)/-2
x=10/6
x=5/3
But I think you are asking the second one!
參考: me
2013-08-12 10:53 pm
2(x-2x-3/4)=-1/6+2x
2x-4x-6/4=-1/6+2x
2x-4x-2x=-1/6+6/4
-4x=16/12
-48x=16
-x=16/48
-x=1/3
x=1/3
2x-4x-6/4=-1/6+2x
2x-4x-2x=-1/6+6/4
-4x=16/12
-48x=16
-x=16/48
-x=1/3
x=1/3
收錄日期: 2021-04-20 14:13:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130812000051KK00146