x+2y+3z=1
x+y-2=2
x+5y+5=0
x+y=4
x+5y= -5
x=4-y
(4-y)+5y= -5
z=(1-2y-x)/3 = (1+4,5-6,25)/3 = -0,75/3 = -0,25
x= 6,25
y= -2,25
x+2y+3z=1
x+y-2=2
x+5y+5=0
x+2y+3z=1
x+y=4
x+5y= -5
x+2y+3z=1
x=4-y
(4-y)+5y= -5
z=(1-2y-x)/3 = (1+4,5-6,25)/3 = -0,75/3 = -0,25
x= 6,25
y= -2,25