2p-q-2r=3......Pers 1 p+2q+4r=4.....Pers 2 p-q-3r=2.........Pers 3 Tolong Di Jawab Dengan Cara Eliminasi.

Eliminasi Persamaan (1) dan (2)
2p - q - 2r = 3 ----- (×1)
p + 2q + 4r = 4 ---- (×2)

2p - q - 2r = 3
2p + 4q + 8r = 8
_____________-
-4q - 10r = -5
4q + 10r = 5

Eliminasi Persamaan (1) dan (3)
2p - q - 2r = 3 ----- (×1)
p - q - 3r = 2 ------- (×2)

2p - q - 2r = 3
2p - 2q - 6r = 4
____________-
q + 4r = -1

Eliminasi Persamaan (1) dan (2) dengan (1) dan (3)
4q + 10r = 5 --- (×1)
q + 4r = -1 ------ (×4)

4q + 10r = 5
4q + 16r = -4
__________-
-6r = 9
r = - 3/2

q + 4r = -1
q = -1 + 4(- 3/2)
q = -1 - 6
q = -7

p - q - 3r = 2
p = 2 + q + 3r
p = 2 + (-7) + 3(-3/2)
p = -5 - 9/2
p = -10/2 - 9/2
p = -19/2

HP {p , q , r}
HP {-19/2 , -7 , -3/2}

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