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6x - 2y = 20
11x = 33
x = 3
y = 3x - 10 = -1
BERPOTONGAN DI (3,-1)
3x - y = 10 [5] = 15x - 5y = 50
11y = -11
y = -1
5x + 2y = 13
5x + 2(-1) = 13
5x - 2 = 13
5x = 13 + 2
5x = 15
x = 3
x = 3 dan , y = -1