Hi ,

There is a simple task to calculate x from 1,5+0,5x = x. Simple!

1,5+0,5x=x

1,5=0,5x

x=3,0

However, colleague of mine come up with another answer:

1,5+0,5x=x /*2

3+x=2x /*(x+1)

3+4x+x^2=2x^2+2x /-(x^2)

3+4x=x^2+2x /-(5x)

3-x=x^2-3x

-(x-3)=x(x-3) / (x-3)

-1 = x

I know it is where he complicates things but above logic seems to be correct.

Where is mistake then ?

Thanks

K