Question

x+y=-1 y+z=1 z+x=0 solve by cramer's rule

Answer 1

Take, x+y+y+z+z+x=4

(x+y)+(x+y)+22=4

O+0+2z=4

z=2

z+x=3

x=3-2=1

x+y=0

1+y=0

y=-1