Question

x- x-1 supra 2=2,x apartine lui R

Answer 1

 [tex]x-\frac{x-1}{2}=2\;\;_{|\cdot2}\\ 2x\,-\,x+1=4\\ \fbox{x=3}\in\mathbb{R}[/tex]

Answer 2

x - (x-1)/2 = 2; aduci la acelasi numitor care e 2 => 2x -x +1 = 4 => x = 3.