x+2y = -4 2x+z = 5 y-3z = -6 tentukan nilai x,y,z? tolong yaa pake cara. makasi

x+2y =-4 ; x =-4-2y
2(-4-2y) +z = 5
-8-4y+z =5
-4y + z =13
y-3z = -6 (kalikan 4) menjadi 4y -12z = -24

4y-12z =24
-4y+z =13
-11z = 11 ; z = -1
y = -6+3z = -9
x = -4-2y = 14