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(b) x - y + z = 3
(c) 3x + 2y + z = 16
(a) disubtitusikan ke (b)
x - (-2x + 3z - 5) + z = 3
x + 2x - 3z + 5 + z = 3
3x - 2z = -2 .......(i)
(a) disubtitusikan ke (c)
3x + 2(-2x + 3z - 5) + z = 16
3x - 4x + 6z - 10 + z = 16
-x + 7z = 26 ....... (ii)
(ii) x = 7z - 26 disubtitusikan ke (i)
3(7z - 26) - 2z = -2
21z - 78 - 2z = -2
19z = 76
z = 4
Maka,
(ii) x = 7z - 26
x = 7(4) - 26
x = 2
(b) x - y + z = 3
(2) - y + (4) = 3
-y = -3
y = 3
∴Hp = {x = 2, y = 3, z = 4; x,y,z ∈ R}
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