Solve 5 - 2x/7 = 1 - (x-4)?

2009-08-25 6:23 pm
lost...need help please

回答 (8)

2009-08-25 6:30 pm
✔ 最佳答案
(5 - 2x)/7 = 1 - (x - 4)
5 - 2x = 7 - 7(x - 4)
- 2x = 2 - 7x + 28
5x = 30
x = 6

Answer: x = 6

Check:
(5 - 2[6])/7 = 1 - (6 - 4)
(5 - 12)/7 = 1 - (2)
- 7/7 = 1 - 2
- 1 = - 1
2016-11-30 3:24 pm
First, sparkling up out the perfect hand edge... = 5-(2x/7) = a million-x+4 Then combine alike words on the perfect hand edge (a million + 4) = 5-(2x/7) = 5-x Multiply by way of with the help of 7 so all numbers are interior the comparable base (5*7) - ((2x/7)*7) = (5*7) - (7*x) 35-2x = 35-7x convey alike words to a minimum of one edge (team 35 and 35 jointly, and the x words jointly) 35-35 = -7x+2x 0 = -5x 0/-5 = x x = 0 desire this enables!
2009-08-25 6:45 pm
5-2x/7=1-(x-4)

5-2x=7(1-(x-4)
5-2x=7-x+4
5-2x=11-x
-6=x
2009-08-25 6:39 pm
I know an excellent source to get you help with this problem.
Khan Academy, which is khanacademy.com.
The teacher is a graduate of MIT and Harvard Business School, but he teaches math in a way that even I can understand. I had an accident and had trouble with Math until I found his videos on You Tube. From there, I discovered his web site, and my Math improved so much people were baffled at how it could happen.
Khan's You Tube channel is also KhanAcademy. You can find examples for your problem in the Algebra section. He does all algebra questions, from easier to harder.
He even makes Math sound fun, and I used to despise Math before I found that channel.
You won't be sorry if you check out this channel. I highly recommend him. He's a great tutor.
參考: Khan Academy, You Tube-KhanAcademy
2009-08-25 6:34 pm
Such presentation troubles me.

Do you mean 5 - (2x/7) or ( 5 - 2x ) / 7 ?

Will take a GUESS at :-

( 5 - 2x ) / 7 = 1 - ( x - 4 )

5 - 2x = 7 - 7 x + 28

5 x = 30

x = 6
2009-08-25 6:32 pm
5 - 2x/7 = 1 - (x - 4 )
5(7) - 2x = 7 - 7(x - 4)
35 - 2x = 7 - (7x - 28)
35 - 2x = 7 - 7x + 28
7x - 2x = 7 + 28 - 35
5x = 0
x = 0
2009-08-25 6:31 pm
5 - 2x/7 = 1 - (x-4)
5 - 1 - 4 = 2x/7 - x
0 = 2x - 7x
-5x = 0
x = 0

I hope this helps.
2009-08-25 6:30 pm
5 - 2x/7 = 1 - (x - 4)
5 - 2x/7 = 1 - x + 4
7(5 - 2x/7) = 7(-x + 1 + 4)
7(5) - 7(2x/7) = -7x + 7(5)
35 - 2x = -7x + 35
7x - 2x = -35 + 35
5x = 0
x = 0/5
x = 0


收錄日期: 2021-05-01 12:41:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090825102322AADrGwx

檢視 Wayback Machine 備份