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5x + y = -2 4x + 5y = 11 ( , ) -10x + 9y = 11-6x + 4y = -6 ( , ) 8x - 10y = 12 -4x - 2y = -20 ( , ) 6x +10y = 2-2x + y = -18 ( , ) -4x - y = 17-2x + y = 13 ( , ) x + 2y = 85x + 5y = 15 ( , ) 2x - 3y = 20-2x + 2y = -12 ( , ) 5x - 7y = -182x - 3y = -9 ( , ) -x + 2y = 132x - 3y = -17 ( , ) |