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Simplifying (x + -4)(y + 5) = 0 Reorder the terms: (-4 + x)(y + 5) = 0 Reorder the terms: (-4 + x)(5 + y) = 0 Multiply (-4 + x) * (5 + y) (-4(5 + y) + x(5 + y)) = 0 ((5 * -4 + y * -4) + x(5 + y)) = 0 ((-20 + -4y) + x(5 + y)) = 0 (-20 + -4y + (5 * x + y * x)) = 0 (-20 + -4y + (5x + xy)) = 0 Reorder the terms: (-20 + 5x + xy + -4y) = 0 (-20 + 5x + xy + -4y) = 0 Solving -20 + 5x + xy + -4y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 5x + xy + 20 + -4y = 0 + 20 Reorder the terms: -20 + 20 + 5x + xy + -4y = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 5x + xy + -4y = 0 + 20 5x + xy + -4y = 0 + 20 Combine like terms: 0 + 20 = 20 5x + xy + -4y = 20 Add '4y' to each side of the equation. 5x + xy + -4y + 4y = 20 + 4y Combine like terms: -4y + 4y = 0 5x + xy + 0 = 20 + 4y 5x + xy = 20 + 4y Reorder the terms: -20 + 5x + xy + -4y = 20 + 4y + -20 + -4y Reorder the terms: -20 + 5x + xy + -4y = 20 + -20 + 4y + -4y Combine like terms: 20 + -20 = 0 -20 + 5x + xy + -4y = 0 + 4y + -4y -20 + 5x + xy + -4y = 4y + -4y Combine like terms: 4y + -4y = 0 -20 + 5x + xy + -4y = 0 The solution to this equation could not be determined.
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