X + 2y = -4 2x + z = 5 Y - 3z = -6 ?

semoga membantu dan jadikan jawaban terbaik jika suka

x + 2y = -4 | x 2

2x + 4y = -8
2x + z = 5
----------------- (-)
4y - z = -13
z = 4y + 13 ... (1)

y - 3z = -6
y - 3(4y + 13) = -6
y - 12y - 39 = -6
-11y = 39 - 6
y = 33/-11
y = -3

z = 4y + 13
z = 4(-3) + 13
z = 1

x + 2y = -4
x + 2(-3) = -4
x = 6 - 4
x = 2

(x , y , z) = (2 , -3 , 1)