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x - y = -1 -
2y = 6
y = 3
kita masukkan ke persamaan pertama
x + y = 5
x + 3 = 5
x = 2
Jadi y = 3 dan x = 2
X-Y=-1 I X1 I X-Y=-1
----------- +
2X =4
X=2
2+Y=5
Y=5-2
Y=3