Thanks4helping

I don't know, that may be a simple error.

You know very well that this problem is practically beyond human comprehension.

Oh ok

thanks

x ( y + 4)  + 5 ( y + 4)  =  1 (x + 5) (y + 4)  = 1   and divide both sides by (y + 4) right

Tricky tricky

Im wrong

If we look at xy + 5y, we see that both terms share a factor of y . This gives me y(x + 5) + 4x + 20 = 1
Similarly,4x and 20 do share a factor of 4 , giving me y(x + 5) + 4x(x + 5) = 1

  these two terms have a factor of x + 5 , so  (y + 4)(x + 5) = 1

Dividing both sides by y + 4 and subtract both sides by to get x = 1/y + 4 - 5   am I right?