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I just found this in a math book, not part of the assignment, and I'd like to know how 3x+7/x+7 doesn't equal 2x.

mind helping?

 thanks!

-A friend in fremont

Guest Apr 26, 2017
 #1
avatar+87301 
+2

3x+7/x+7   getting a common denominator of "x"

 

[ 3x^2   + 7   +   7x  ]  /  x

 

 

cool cool cool

CPhill  Apr 26, 2017
 #2
avatar+87301 
+2

 

One of our regulars, hectictar, pointed out to me that this might be :

 

(3 x + 7)  / (x + 7)      if so, we have

 

               3

x + 7   [   3x +  7   ]

               3x  + 21 ]

              ________

                      -14

 

The result is   3  + [ -14 / ( x + 7) ]

 

Thanks , hectictar  !!!!!

 

 

 

cool cool cool

CPhill  Apr 26, 2017
edited by CPhill  Apr 26, 2017

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