solve for x: 5x+7-2x=11-12x-16?

2008-06-23 3:08 pm

回答 (7)

2008-06-23 3:12 pm
✔ 最佳答案
5x+7-2x=11-12x-16 "Get like terms on same side."

5x+12x - 2x = 11 - 16 - 7 "Combine like terms"

15x = -12 "Divide to get x by itself."

x= -12/15 or -4/5 (reduced)
參考: Math Major
2008-06-23 3:22 pm
5x -2x+12x=11-16-7
15x = -12
x = -12/15 = -4/5
2008-06-23 3:22 pm
5x + 7 - 2x = 11 - 12x - 16
5x - 2x + 12x = 11 - 7 - 16
3x + 12x = 4 - 16
15x = -12
x = -12/15
x = -4/5 (-0.8)
2008-06-23 3:19 pm
5x+7-2x=11-12x-16
15x=-12
x=-5/4
2008-06-23 3:33 pm
3x + 7 = - 12x - 5
15x = - 12
x = - 12/15
x = - 4/5
2008-06-23 3:24 pm
5x + 7 - 2x = 11 - 12 x - 16
by transposition...
5x - 2x + 12x = 11 - 16 - 7

15x = -12

x = (-12/15) = (-4/5)
2008-06-23 3:23 pm
5x + 7 - 2x = 11 - 12x - 16

15x = -12

x = -12/15
x = -4/5


收錄日期: 2021-05-01 10:38:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080623070818AA2InFY

檢視 Wayback Machine 備份