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x + 5y = 13 dan 2x - y = 4
x = 13 - 5y substitusikan ke 2x - y = 4
2x - y = 4
2(13 - 5y) - y = 4
26 - 10y - y = 4
-11y = 4 - 26
-11y = -22
y = -22/-11
y =2
Karena y = 2 substitusikan ke x + 5y = 13
x + 5y = 13
x + 5.2 = 13
x + 10 = 13
x = 13 - 10
x = 3
HP = {3, 2}