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y = 0 - 2x + 5 substitusikan ke 2x + 2y = 14
2x + 2y = 14
2x + 2(0 - 2x + 5) = 14
2x + 0 - 4x + 10 = 14
-2x + 10 = 14
-2x = 14 - 10
-2x = 4
x = 4/-2
x = -2
Karena x = -2 substitusikan ke 2x + y - 5 = 0
2x + y - 5 = 0
2.-2 + y - 5 = 0
-4 + y - 5 = 0
y = 0 + 4 + 5
y = 9
HP = {-2,9}