2y - 3z = -7 x + y = 1 3x + 2z = 6

2y - 3z = -7 (1)
x + y = 1     (2)
3x + 2z = 6 (3)

eliminasi 1 dan 2
2y - 3z = -7 l x 1 l     2x - 3z = -7
x + y = 1     l x 2 l     2x + 2y = 2
                               ----------------- -
                                3z - 2y = -9   (4)
eliminasi 4 dan 3
3z - 2y = -9 l x 2 l   6z - 4y = -18
3x + 2z = 6 l x 3 l   9x + 6z = 18
                              ----------------- -
                              9x + 4y = -36 (5)
eliminasi 5 dan 2
9x + 4y = -36 l x 1 l  9x + 4y = -36
x + y = 1        l x 4 l  4x + 4 y = 4
                                ------------------ -
                                5x = -40
                                  x = -8
x + y = 1
-8 + y = 1
y = 9

3x + 2z = 6
3(-8) + 2z = 6
2z = 30
z = 15


itu kalau yang dicari nilai x,y, dan z nya
maaf kalau salah