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THIS IS REALLY NOT INTERESTING AT ALL BUT I SIMPLY FORGOT HOW TO SOLVE FOR X:

 

$${\mathtt{\,-\,}}{\frac{{\mathtt{7}}}{\left({\mathtt{X}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}}\right)}} = {\mathtt{\,-\,}}{\mathtt{8}}{\mathtt{\,-\,}}\left({\frac{{\mathtt{5}}}{\left({\mathtt{X}}{\mathtt{\,-\,}}{\mathtt{2}}\right)}}\right)$$

 Aug 27, 2014

Best Answer 

 #1
avatar+130511 
+5

Let's multiply through by -1 to get rid of all those nasty negatives !!.....so we have

7/(x+1) = 8 + 5/(x - 2)   ....and getting a common denominator on the right , we have....

7/(x+1) = [8(x-2) + 5]/(x-2)  ..... simplify on the right

7 /( x+1) = (8x - 16 + 5) / (x-2)

7 / (x+1) = (8x - 11) /(x -2)   .....one way to solve this is just to cross-multiply

7(x-2) = (x+1)(8x-11)

7x - 14 = 8x^2 - 3x - 11  ......subtract 7x and add 14 to both sides

0 = 8x^2 - 10x + 3      ......see if this factors

(2x - 1)(4x - 3) = 0

And setting each factor to 0, we have that x = 1/2 or x = 3/4

 Aug 27, 2014
 #1
avatar+130511 
+5
Best Answer

Let's multiply through by -1 to get rid of all those nasty negatives !!.....so we have

7/(x+1) = 8 + 5/(x - 2)   ....and getting a common denominator on the right , we have....

7/(x+1) = [8(x-2) + 5]/(x-2)  ..... simplify on the right

7 /( x+1) = (8x - 16 + 5) / (x-2)

7 / (x+1) = (8x - 11) /(x -2)   .....one way to solve this is just to cross-multiply

7(x-2) = (x+1)(8x-11)

7x - 14 = 8x^2 - 3x - 11  ......subtract 7x and add 14 to both sides

0 = 8x^2 - 10x + 3      ......see if this factors

(2x - 1)(4x - 3) = 0

And setting each factor to 0, we have that x = 1/2 or x = 3/4

CPhill Aug 27, 2014

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