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Simplifying 21 + -7x + 3y + -1xy = 0 Reorder the terms: 21 + -7x + -1xy + 3y = 0 Solving 21 + -7x + -1xy + 3y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -7x + -1xy + -21 + 3y = 0 + -21 Reorder the terms: 21 + -21 + -7x + -1xy + 3y = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -7x + -1xy + 3y = 0 + -21 -7x + -1xy + 3y = 0 + -21 Combine like terms: 0 + -21 = -21 -7x + -1xy + 3y = -21 Add '-3y' to each side of the equation. -7x + -1xy + 3y + -3y = -21 + -3y Combine like terms: 3y + -3y = 0 -7x + -1xy + 0 = -21 + -3y -7x + -1xy = -21 + -3y Reorder the terms: 21 + -7x + -1xy + 3y = -21 + -3y + 21 + 3y Reorder the terms: 21 + -7x + -1xy + 3y = -21 + 21 + -3y + 3y Combine like terms: -21 + 21 = 0 21 + -7x + -1xy + 3y = 0 + -3y + 3y 21 + -7x + -1xy + 3y = -3y + 3y Combine like terms: -3y + 3y = 0 21 + -7x + -1xy + 3y = 0 The solution to this equation could not be determined.
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