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-x + y = -1 |x6
-2x + 6y = 10 |x1
-6x + 6y = -6 (dikurang)
-2x + 6y = 10
-4x = -16
x = -16 : -4 = 4
-2(4) + 6y = 10
-8 + 6y = 10
6y = 10 + 8
y = 18 : 6 = 3
x = 4 | y = 3