X+y+z=1 X+2y+3z=5 X+2y-z=-9

Materi : SPLTV
Kelas : X SMA

x + y + z = 1 ............... 1)
x + 2y + 3z = 5 ..........2
x + 2y - z = -9 .......... 3)

x + y + z = 1
x + 2y + 3z = 5
◆◇◆◇◆◇◆◇◆◇◆◇ (-)
-y - 2z = -4 ................. 4)

x + 2y + 3z = 5
x + 2y - z = -9
◆◇◆◇◆◇◆◇◆◇◆◇ (-)
4z = 14
z = 14/4
z = 3,5

-y - 2z = -4
-y = -4 + 2z
-y = -4 + 2(3,5)
-y = -4 + 7
-y = 3
y = -3

x + y + z = 1
x + (-3) + 3,5 = 1
x = 1 - 3,5 + 3
x = 4 - 3,5
x = 0,5

Hp = { 0,5 , -3 , 3,5 }