X, y dan z adalah penyelesaian dari sistem persamaan X + 2y = - 4 2x + z = 5 Y - 3z = - 6 Tentukan nilai x, y, z

X + 2y = - 4 (x2)
2x + z = 5
_____________

2x+4y= -8
2x + z = 5
__________-
4y - z = 1


4y - z = 1
Y - 3z = - 6 (x4)
______________

4y-z =1
4y-12z = -24
____________ -
11z = 25
z= 25/11


4y - 25/11 =1
4y= 1+ 25/11
4y= 11/11 + 25/11
4y= 36/11
y= 36/11 x 1/4
y = 9/11

x+2y = -4
x + 2(9/11) = -4
x + 18/11 = -4
x = -4 - 18/11
x = -44/11 - 18/11
x = -62/11

srry klau slah