dengan cara determinan matriks yang no. 10 ya

x + y - z = -4 ---(1)
2x + 4y + 2z = 10 ---(2)
x + 3y + z = 4 ---(3)
[Jawab] Bentuk dua persamaan tanpa variabel y
(1) × 4 = 4x + 4y - 4z = -16 ---(1)'
(2) - (1)' = -2x + 6z = 12 ---(4)
(1) × 3 = 3x + 3y - 3z = -12 --- (1)''
(3) - (1)'' = -2x + 4z = 16 ---(5)
(4) - (5) = 2z = -4
= z = -2
Masukan ke (4)
-2x - 12 = 12
-2x = 12 + 12
-2x = 24
x = -12
Masukan z = -2 & x = -12 ke (1)
-12 + y + 2 = -4
y = - 4 - 2 + 12
y = - 6 + 12
y = 6
Jadi, (x,y,z) = (- 12, 6,- 2)
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Maaf kalo jawabnya salah