(х-1)/2=2х-2х/2;|*2
х-1=4х-2х;
х-1=2х
х-2х=1
-х=1
х= —1
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(х-1)/2=2х-2х/2;|*2
х-1=4х-2х;
х-1=2х
х-2х=1
-х=1
х= —1