Question

x+y=0, -x+z=0 and -2x-2y-z=0, find value of x,y,z.

Answer 1

given X+y=0
X=-y. (1)
given -x+z=0
z=X
z=-y. (2)
given -2x-2y-z=0
-2(-y)-2y-(-y)=0 from (1)&(2)
2y-2y+y=0
so y=0

by problem X+y=0
x+0=0
so X=0

by problem -x+z=0
-0+z=0
z=0

Answer 2

hello



x+y=0
y=0-x
y= -x


-x+z=0
z=0+x
z=x


-2x-2y-z=0
putting the value in the equation
-2x-2(-x)-x=0
-2x+2x-x=0
-x=0
x=0

then,
x+y=0
0+y=0
y=0


-x+z=0
0+z =0
z=0

hope this answers will help you