Answer:
(0, 3 , -2)
Step-by-step explanation:
X-y+2z=-7 ------------------ equ 1
y+z=1 ------------------ equ 2
x-2y-3z=0 ------------------ equ 3
equ 1 X - y + 2z = -7
equ 3 x - 2y - 3z = 0
- + __+_____
equ 1 - equ 3 ⇒ y + 5z = -7 -------------- equ 4
equ 2 y + z = 1
equ 4 y + 5z = -7
- - = +
equ 2 - equ 4 -4z =8
z = 8/ -4 = -2
z = -2
Put z = -2 in equ 2,
y + z = 1
y - 2 = 1
y = 1 + 2 =3
y = 3
Put z = -2 & y = 3 in equ 1
X - y + 2z = -7
x - 3 + 2* (-2) = -7
x - 3 - 4 = -7
x -7 = -7
x = -7 + 7 =0
x = 0
