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Simplifying (x + y) + xy = 90 Remove parenthesis around (x + y) x + y + xy = 90 Reorder the terms: x + xy + y = 90 Solving x + xy + y = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1y' to each side of the equation. x + xy + y + -1y = 90 + -1y Combine like terms: y + -1y = 0 x + xy + 0 = 90 + -1y x + xy = 90 + -1y Reorder the terms: -90 + x + xy + y = 90 + -1y + -90 + y Reorder the terms: -90 + x + xy + y = 90 + -90 + -1y + y Combine like terms: 90 + -90 = 0 -90 + x + xy + y = 0 + -1y + y -90 + x + xy + y = -1y + y Combine like terms: -1y + y = 0 -90 + x + xy + y = 0 The solution to this equation could not be determined.
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