Question

(1/x-1)-(2/x-2)=3/x-3

Answer 1

solving it we get
$- \frac{1}{x} + 1 = \frac{3}{x} - 3$
that is
$x = 1$

Answer 2

1×-1-2×-2=3×-3
=-1-2=-3
=-3=-3
-3+3=0