5/x+4/5=1?
回答 (7)
2017-08-22 11:26 pm
(5/x) + (4/5) = 1
[(5/x) + (4/5)] * 5x = 1 *5x
25 + 4x = 5x
5x - 4x = 25
x = 25
[(5/x) + (4/5)] * 5x = 1 *5x
25 + 4x = 5x
5x - 4x = 25
x = 25
2017-08-22 11:26 pm
5/x + 4/5 = 1
25 + 4x = 5x
x = 25
25 + 4x = 5x
x = 25
2017-08-23 1:30 am
5/x + 4/5 = 1
25 + 4x = 5x
x = 25
25 + 4x = 5x
x = 25
2017-08-22 11:32 pm
First multiply all terms by X
In the first term the x cancels out.
5+(4/5)x=x
Subtract x from both sides. Or move the x on right to left.
5+(4/5)x-x=0
Then change the -x to have the same numerator(bottom) as (4/5)x
Since it is -1, it will be -5/5
5+(4/5)x-(5/5)x=0
Add the x
5-(1/5x)=0
Multiple all by 5 to get X a whole number
25-x=0
Move x back to right side
25=x or x=25
In the first term the x cancels out.
5+(4/5)x=x
Subtract x from both sides. Or move the x on right to left.
5+(4/5)x-x=0
Then change the -x to have the same numerator(bottom) as (4/5)x
Since it is -1, it will be -5/5
5+(4/5)x-(5/5)x=0
Add the x
5-(1/5x)=0
Multiple all by 5 to get X a whole number
25-x=0
Move x back to right side
25=x or x=25
2017-08-22 11:25 pm
I dunno.
2017-08-22 11:23 pm
5/x + 4/5 = 1
25 + 4x = 5x
x = 25
25 + 4x = 5x
x = 25
2017-08-22 11:23 pm
5/x = 1 - 4/5
5 = x(1/5)
x = 25
5 = x(1/5)
x = 25
收錄日期: 2021-04-24 00:38:22
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https://hk.answers.yahoo.com/question/index?qid=20170822152102AAq6LRd