Tentukan nilai y dari SPLTV berikut adalah
x+2y-z=4
2x-3z=-16
5z=20
x+2y-z=4
2x-3z=-16
5z=20
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5z = 20
z = 20/5
z = 4
••
2x - 3z = -16
2x - 3(4) = -16
2x -12 = -16
2x = -16 +12
2x = -4
x = -4/2
x = -2
•••
x + 2y - z = 4
-2 + 2y -4 = 4
-2 -4 +2y = 4
-6 +2y = 4
2y = 4+6
2y = 10
y= 10/2
y= 5
Jadi, y = 5