Система х1+х2-2х3=-1 Х1+2х2+3х3=0 4х4+5х2-2х3=-3

система х1+х2-2х3 = -1               х1+2х2+3х3 = 0                4х1+5х2-2х3 = -3система  х1 = 2х3-х2-1                2х3-х2-1+2х2+3х3 = 0                4(2х3-х2-1)+5х2-2х3 = -3система  х1 = 2х3-х2-1                5х3+х2-1 = 0                8х3-4х2-4+5х2-2х3 = -3система  х1 = 2х3-х2-1                5х3+х2 = 1                 6х3+х2 = 1система  х1 = 2х3-х2-1                х2 = 1-5х3               6х3+1-5х3 = 1система  х1 = 2х3-х2-1                х2 = 1-5х3                х3 = 0система  х1 = -х2-1               х2 = 1-5*0                х3 = 0система   х1 = -1-1                 х2 = 1                 х3 = 0система  х1 = -2                х2 = 1                х3 = 0