I have a big problem solving this question.!
8-(2x+1)+(5-x)4=2-(5-3x)7
Here is how I tried to solve the question:
8-2x-1+20-4x=2+7(-5+3x)
27-6x=2-35+21x
27-6x=-33+21x
60=27x
I know the answer should be: x=4
But as you can this from my solving it Cleary doesn't end like x=4.
What did I do wrong? And how is the way to solve this question?
Math question?
2015-07-17 8:24 pm
回答 (7)
2015-07-17 8:34 pm
Your algebra is correct for the problem you wrote and 60/27 = 20/9 is the solution to that equation. So you either copied the question or the answer incorrectly.
2015-07-17 8:47 pm
Your working is correct
8-2x-1+20-4x=2+7(-5+3x)
27-6x=-33+21x
60=27x
x = 20/9
8-2x-1+20-4x=2+7(-5+3x)
27-6x=-33+21x
60=27x
x = 20/9
2015-07-18 10:58 am
x=4 is not correct You put x=4 both sides LHS=3 and RHS=51
2015-07-18 6:47 am
Should be 8-(2x+1)+(5-x)4=2-(5-3x)/7
2015-07-17 8:29 pm
Clearly that if you plug-in x=4 for the equation, it is not the answer.
2015-07-18 7:56 pm
Are the 4 and 7 exponents?
2015-07-18 4:44 am
x=/= 4, x=20/9
收錄日期: 2021-04-30 01:35:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150717122417AAoocLd