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2x+2y+3z=-8|x2
--------------------
4x-y+z=4
4x+4y+6z=-16
-------------------- -
-5y-5z=20
2x+2y+3z=-8
2x-3y+2z=8
------------------- -
5y+z=-16
-5y-5z=20
5y+z=-16
--------------- +
-4z=4
z=-1
5y+z=-16
5y-1=-16
5y=-16+1
5y=-15
y=-3
4x-y+z=4
4x-(-3)+(-1)=4
4x+3-1=4
4x+2=4
4x=4-2
4x=2
x=2/4
x=1/2
(2x+y):z
(2.1/2+(-3)):-1
(1-3):-1
-2:-1
2
jawaban'a adalah b
semoga membantu