himpunan penyelesaian - x + y +z = - 4 x + 2y +z = 0 2x + 3y +z = 1

-x + y + z = 4 ...(1)
x + 2y + z = 0 ...(2)
2x + 3y + z = 1 ...(3)

-x + 2y + z = 0
x = -2y - z... ( 4 )

variable z, (1) (2) (3)
z + z + z = 1 + 1 + 1 = 3
3/3 = 1 berarti, z = 1

-y - z = 1
-y - 1 = 1
-y = 1+1
-y = 2
y = -2

x = -2y - z
x = -2(-2) - 1
x = 4 - 1
x = 3

semoga membantu....