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Verified answer
2x + 2y = 6 ..... bagi 2x + y = 3
x = 3 - y
x + 3y = 7
3 - y + 3y = 7
2y = 7 - 3
y = 2
x = 3 - y = 3 - 2 = 1
HP = {(1,2)}