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Simplifying (yz + 9)(z + -9) = 0 Reorder the terms: (9 + yz)(z + -9) = 0 Reorder the terms: (9 + yz)(-9 + z) = 0 Multiply (9 + yz) * (-9 + z) (9(-9 + z) + yz(-9 + z)) = 0 ((-9 * 9 + z * 9) + yz(-9 + z)) = 0 ((-81 + 9z) + yz(-9 + z)) = 0 (-81 + 9z + (-9 * yz + z * yz)) = 0 (-81 + 9z + (-9yz + yz2)) = 0 Reorder the terms: (-81 + -9yz + yz2 + 9z) = 0 (-81 + -9yz + yz2 + 9z) = 0 Solving -81 + -9yz + yz2 + 9z = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '81' to each side of the equation. -81 + -9yz + yz2 + 81 + 9z = 0 + 81 Reorder the terms: -81 + 81 + -9yz + yz2 + 9z = 0 + 81 Combine like terms: -81 + 81 = 0 0 + -9yz + yz2 + 9z = 0 + 81 -9yz + yz2 + 9z = 0 + 81 Combine like terms: 0 + 81 = 81 -9yz + yz2 + 9z = 81 Add '-9z' to each side of the equation. -9yz + yz2 + 9z + -9z = 81 + -9z Combine like terms: 9z + -9z = 0 -9yz + yz2 + 0 = 81 + -9z -9yz + yz2 = 81 + -9z Reorder the terms: -81 + -9yz + yz2 + 9z = 81 + -9z + -81 + 9z Reorder the terms: -81 + -9yz + yz2 + 9z = 81 + -81 + -9z + 9z Combine like terms: 81 + -81 = 0 -81 + -9yz + yz2 + 9z = 0 + -9z + 9z -81 + -9yz + yz2 + 9z = -9z + 9z Combine like terms: -9z + 9z = 0 -81 + -9yz + yz2 + 9z = 0 The solution to this equation could not be determined.
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