waheguru
  • waheguru
How Do I solve this
Mathematics
schrodinger
  • schrodinger
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waheguru
  • waheguru
1 Attachment
freckles
  • freckles
What do you mean without canceling out?
waheguru
  • waheguru
Can you show how to solve this

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freckles
  • freckles
I'm not really sure what that means here? You mean without clearing the denominators?
anonymous
  • anonymous
get the number on one side of the = and the others on the other side so that you can manipulate them directly.
freckles
  • freckles
I would first clear the denominators by multiplying both sides by (x-7)
waheguru
  • waheguru
CAn you show me please I tried many times
freckles
  • freckles
Multiply the 2 terms on the left by (x-7) And Multiply the 1 term on the right by (x-7)
freckles
  • freckles
What do you get after performing this?
anonymous
  • anonymous
No, no........
freckles
  • freckles
What @estudier ?
waheguru
  • waheguru
x^2-7x+6x-42=7x-49 right?
waheguru
  • waheguru
\[x^2-7x+6x-42=7x-49 \]
freckles
  • freckles
Where does that x^2 come from?
anonymous
  • anonymous
|dw:1342565026387:dw|
waheguru
  • waheguru
Freckles when I timed x(x-7)
freckles
  • freckles
What is \[\frac{x}{x-7} \cdot (x-7)=?\] \[6 \cdot (x-7)=?\] \[\frac{7}{x-7} \cdot (x-7)=?\]
anonymous
  • anonymous
This equation is inconsistent.
waheguru
  • waheguru
the first one \[x^2-7x\]
freckles
  • freckles
no @waheguru \[\frac{a}{a} , \text{ assuming of course } a \neq 0\]
freckles
  • freckles
=1
anonymous
  • anonymous
Why do I feel like I am talking to myself here?
freckles
  • freckles
left out the a/a=1 part
waheguru
  • waheguru
So the x's cancel out and it becomes 7x?
freckles
  • freckles
\[\frac{x(x-7)}{(x-7)}\]
anonymous
  • anonymous
There is no need to multiply initially that is just a waste of time.
freckles
  • freckles
What factor does the bottom and top have in common?
waheguru
  • waheguru
@estudier I know you can cencel out but i wanna try this way
anonymous
  • anonymous
The equation is inconsistent!1111
waheguru
  • waheguru
freckles
  • freckles
The top and bottom both have the factor (x-7) in common
waheguru
  • waheguru
Yes
anonymous
  • anonymous
I am not cancelling anything.......
anonymous
  • anonymous
x-7/x-7 = -6 is just nonsense
freckles
  • freckles
\[\frac{x \not{(x-7)}}{ \not{(x-7)}}\] Imagine that canceler thingy is over the whole factor (x-7) Couldn't do it in latex so we have the first one x So Now try the other two
anonymous
  • anonymous
You two evidently have nothing better to do.....:-)
freckles
  • freckles
@estudier I know what you are saying but I just want to convince him
waheguru
  • waheguru
@estudier Then How do you think we solve this
anonymous
  • anonymous
There is no solution, the equation is not consistent (it is a false equation)
waheguru
  • waheguru
no its not, there is an asnwer !!!!!!
anonymous
  • anonymous
It is like writing 1= 2
freckles
  • freckles
Right but we need to show him that...and convince him... If he doesn't understand your way, then there is no hurt in me showing this other way
freckles
  • freckles
@estudier is right there is no solution
waheguru
  • waheguru
guys ok thanks
anonymous
  • anonymous
He doesn't want to understand it, that is a different thing.
freckles
  • freckles
We will get x=7 but that is a contradiction because x cannot be 7
freckles
  • freckles
Doing it the way I was trying to show @waheguru
freckles
  • freckles
So therefore no solution
anonymous
  • anonymous
When simplifying add or subtract like things first.....
waheguru
  • waheguru
guys look at this http://www.youtube.com/watch?v=q7_xdLZHN6g the same question appears at about 5 miutes
waheguru
  • waheguru
this is not impossible noting is
waheguru
  • waheguru
@estudier @freckles http://www.youtube.com/watch?v=q7_xdLZHN6g at 5 mins
anonymous
  • anonymous
The equation is inconsistent (I don't care what is on youtube)
waheguru
  • waheguru
Ur right i am so sorry
waheguru
  • waheguru
I just realized Brother I appoloze
anonymous
  • anonymous
Accepted.
waheguru
  • waheguru
I was just confued
freckles
  • freckles
@waheguru the way the video is doing it was the exact way I was going to show you
freckles
  • freckles
Did you see that she got x=7 but then since we have x-7 on bottom then x cannot be 7 so there is no solution
waheguru
  • waheguru
yea

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