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3x+2y = -13
atas dikali 3 bawah dikali satu
3x-3y=-3
3x+2y=-13-
-5y = 10
y=-2
atasdikali 2 bawah dikali satu
2x-2y=-2
3x+2y=-13+
5x = -15
x= -3
3x + 2y = -13 1
lalu dikali semuanya
3x - 3y = -3
3x + 2y = -13-
-5y = -10
y = -10
-5
y = 2