Tentukan HPnya dengan eliminasi
2x + y = 7 dan x - y = 8
2x + y = 7 dan x - y = 8
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x - y = 8.........(2)
2x + y =7
x - y = 8
---------- +
3x = 15
x = 15/3
× = 5
2x + y = 7
2(5) + y = 7
10 + y = 7
y = 7-10
y = -3
HP{5,-3}