X + 2y + 3z = 5 X+ y + z = -1 3x – 2y – z = -9

Penjelasan dengan langkah-langkah:

x + 2y + 3z = 5 (1)

x + y + z = -1 (2)

3x – 2y -z = -9 (3)

x + 2y + 3z = 5

x + y + z = -1

_____________ –

y + 2z = 6 (4)

x + 2y + 3z = 5 | x3 | 3x + 6y + 9z = 5

3x – 2y – z = -9 | x1 | 3x – 2y – z = -9

______________-

8y + 10z = 24 (5)

y + 2z = 6 | x8 | 8y + 16z = 48

8y + 10z = 24 | x1 | 8y + 10z = 24

___________-

6z = 24 , z = 4

y + 2z = 6

y + 2(4) = 6

y + 8 = 6

y = -2

x + y + z = -1

x + (-2) + 4 = -1

x + 2 = -1

x = -3

klo salah, silahkan di koreksi