Tentukan Hp dari X + y + 2 = 6 2x + y + 2z = 18 x + 2y + z = 7

# 2x + y + 2z = 18 |dikali 1|
x + 2y + z = 7 |dikali 2|

2x + y + 2z = 18
2x + 4y + 2z = 14
----------------------------(dikurang)
-3y = 4
y = -( 4/3)

# x + y = 6 - 2
x + y = 4
x -(4/3) = 4
x = 4 + 4/3
x = 16/3

# x + 2y + z = 7
16/3 + 2(-4/3) + z = 7
16/3 + (-8/3) + z = 7
z = 7 - 16/3 + 8/3
= (21 - 16 + 8)/3
= 13/3