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Simplifying (3x + -1y)(x + -3y) = 18 Multiply (3x + -1y) * (x + -3y) (3x * (x + -3y) + -1y * (x + -3y)) = 18 ((x * 3x + -3y * 3x) + -1y * (x + -3y)) = 18 Reorder the terms: ((-9xy + 3x2) + -1y * (x + -3y)) = 18 ((-9xy + 3x2) + -1y * (x + -3y)) = 18 (-9xy + 3x2 + (x * -1y + -3y * -1y)) = 18 (-9xy + 3x2 + (-1xy + 3y2)) = 18 Reorder the terms: (-9xy + -1xy + 3x2 + 3y2) = 18 Combine like terms: -9xy + -1xy = -10xy (-10xy + 3x2 + 3y2) = 18 Solving -10xy + 3x2 + 3y2 = 18 Solving for variable 'x'. Reorder the terms: -18 + -10xy + 3x2 + 3y2 = 18 + -18 Combine like terms: 18 + -18 = 0 -18 + -10xy + 3x2 + 3y2 = 0 The solution to this equation could not be determined.
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