5 - 2 (x - 1) = 3x - 8, please solve?

2009-06-07 11:03 am
5-2(x-1)=3x - 8

please solve

回答 (12)

2009-06-07 11:10 am
✔ 最佳答案
5-2(x-1)=3x-8
5-2x+2=3x-8
7-2x=3x-8
7+8=3x+2x
15=5x
x=3
thats it
2009-06-08 3:21 pm
5 - 2 x + 2 = 3 x - 8
15 = 5 x
x = 3
2009-06-08 5:01 am
5 - 2 (x - 1) = 3x - 8

5 - 2x + 2 = 3x - 8
7 - 2x = 3x - 8
7 + 8 = 3x + 2x
15 = 5x
x = 3
2009-06-08 1:36 am
Solve:

5 - 2(x - 1) = 3x - 8

5(-2x + 2) = 3x - 8

5 - 2x + 2 = 3x -8

Combine like terms:

5 + 2 = 7

7 - 2x = 3x -8

Add -3x to each side of the equation

7 - 2x - 3x = 3x - 8 - 3x

7 - 5x = -8

Add -7 to each side of the equation

7 - 5x - 7 = -8 - 7

-5x = -15

Divide each side by -5

-5x/-5 = -15/-5

x = 3
2009-06-08 1:34 am
5 - 2(x - 1) = 3x - 8
5 - 2x + 2 = 3x - 8
- 2x - 3x = - 7 - 8
- 5x = - 15
x = 3.
2009-06-07 7:13 pm
5 - 2(x - 1) = 3x - 8
5 - 2*x + 2*1 = 3x - 8
5 - 2x + 2 = 3x - 8
-3x - 2x = -5 - 2 - 8
-5x = -15
x = -15/-5
x = 3
2009-06-07 6:57 pm
5-2(x-1) = 3x-8
5-2x+2
2x+7

-2x+7=3x-8
+(2x) +(2x)

7=5x-8
+8 +8

15=5x

15/5=3
參考: Algebra Book
2009-06-07 6:14 pm
x=3
2009-06-07 6:12 pm
x = 3
2009-06-07 6:11 pm
5- 2(x-1) = 3x -8
5- 2x- 2(-1) = 3x -8
5 -2x +2 = 3x -8
7 +8 = 3x +2x
15= 5x
x= 15/5 = 3
2009-06-07 6:10 pm
5 - 2x + 2 = 3x - 8
7 + 8 = 3x + 2x
15 = 5x
x = 3


收錄日期: 2021-05-01 12:27:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090607030335AAXCxsd

檢視 Wayback Machine 備份