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Simplifying xy = 3x + -7y + 21 Reorder the terms: xy = 21 + 3x + -7y Solving xy = 21 + 3x + -7y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -3x + xy = 21 + 3x + -3x + -7y Combine like terms: 3x + -3x = 0 -3x + xy = 21 + 0 + -7y -3x + xy = 21 + -7y Reorder the terms: -21 + -3x + xy + 7y = 21 + -7y + -21 + 7y Reorder the terms: -21 + -3x + xy + 7y = 21 + -21 + -7y + 7y Combine like terms: 21 + -21 = 0 -21 + -3x + xy + 7y = 0 + -7y + 7y -21 + -3x + xy + 7y = -7y + 7y Combine like terms: -7y + 7y = 0 -21 + -3x + xy + 7y = 0 The solution to this equation could not be determined.
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