Carilah nilai x , y, z dari persamaan berikut ini : 2x - 4y- 3z = 11 2x - 3y - 4z = 8 6x - 5y =2z = 26

Eliminasi (1) dan (2)
2x - 4y - 3z = 11
2x - 3y - 4z = 8
____________-
-y + z = 3

Eliminasi (1) dan (3)
2x - 4y - 3z = 11 --- (×3)
6x - 5y - 2z = 26 (×1)

6x - 12y - 9z = 33
6x - 5y - 2z = 26
_____________-
-7y - 7z = 7 ------- (÷7)
-y - z = 1

Eliminasi (1) dan (2) dengan (1) dan (3)
-y + z = 3
-y - z = 1
_______-
2z = 2
z = 1

Subtitusi →
-y + z = 3
-y + 1 = 3
-y = 2
y = -2

Subtitusi →
2x - 4y - 3z = 11
2x - 4(-2) - 3(1) = 11
2x + 8 - 3 = 11
2x = 11 - 5
x = 6 : 2
x = 3

HP {x , y , z}
HP {3, -2, 1}

Semoga berguna