<PRE><B>Question 98802</B>


    x2+5x=40-x

   x^2+5x+x-40 = 0

   x^2+6x-40 = 0
   
   x^2+10x-4x-40 = 0

   x(x+10)-4(x+10) = 0

    (x+10)(x-4) = 0
        
    x+10 = 0   or x = -10

     x-4 = 0   or x = 4
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