Selesaikan x-2y + 3z =0 y =1 x + 5z =8

y = 1

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

Eliminasi
x + 3z = 2
x + 5z = 8
________-
-2z = -6
z = 3

subtitusi
x + 3z = 2
x = 2 - 3(3)
x = -7

HP {x, y, z}
HP {-7, 1, 3}