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Simplifying (x + y + -1)(xy + -1) = 2015 Reorder the terms: (-1 + x + y)(xy + -1) = 2015 Reorder the terms: (-1 + x + y)(-1 + xy) = 2015 Multiply (-1 + x + y) * (-1 + xy) (-1(-1 + xy) + x(-1 + xy) + y(-1 + xy)) = 2015 ((-1 * -1 + xy * -1) + x(-1 + xy) + y(-1 + xy)) = 2015 ((1 + -1xy) + x(-1 + xy) + y(-1 + xy)) = 2015 (1 + -1xy + (-1 * x + xy * x) + y(-1 + xy)) = 2015 (1 + -1xy + (-1x + x2y) + y(-1 + xy)) = 2015 (1 + -1xy + -1x + x2y + (-1 * y + xy * y)) = 2015 Reorder the terms: (1 + -1xy + -1x + x2y + (xy2 + -1y)) = 2015 (1 + -1xy + -1x + x2y + (xy2 + -1y)) = 2015 Reorder the terms: (1 + -1x + -1xy + xy2 + x2y + -1y) = 2015 (1 + -1x + -1xy + xy2 + x2y + -1y) = 2015 Solving 1 + -1x + -1xy + xy2 + x2y + -1y = 2015 Solving for variable 'x'. Reorder the terms: 1 + -2015 + -1x + -1xy + xy2 + x2y + -1y = 2015 + -2015 Combine like terms: 1 + -2015 = -2014 -2014 + -1x + -1xy + xy2 + x2y + -1y = 2015 + -2015 Combine like terms: 2015 + -2015 = 0 -2014 + -1x + -1xy + xy2 + x2y + -1y = 0 The solution to this equation could not be determined.
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