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2x - y = 8
eliminasi x
2x + 4y = 18
2x - y = 8
dikurangi
5y = 10
y = 10:5
y = 2
x + 2y = 9
x + 2.2 = 9
x + 4 = 9
x = 9-4
x = 5
HP {5 , 2}
x+2y=9 2x-y=8
=5+2.2=9 2.5-2=8
=5+4=9 10-2=8