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Simplifying z(y + 9) + 7(y + 9) = 0 Reorder the terms: z(9 + y) + 7(y + 9) = 0 (9 * z + y * z) + 7(y + 9) = 0 Reorder the terms: (yz + 9z) + 7(y + 9) = 0 (yz + 9z) + 7(y + 9) = 0 Reorder the terms: yz + 9z + 7(9 + y) = 0 yz + 9z + (9 * 7 + y * 7) = 0 yz + 9z + (63 + 7y) = 0 Reorder the terms: 63 + 7y + yz + 9z = 0 Solving 63 + 7y + yz + 9z = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + 7y + yz + -63 + 9z = 0 + -63 Reorder the terms: 63 + -63 + 7y + yz + 9z = 0 + -63 Combine like terms: 63 + -63 = 0 0 + 7y + yz + 9z = 0 + -63 7y + yz + 9z = 0 + -63 Combine like terms: 0 + -63 = -63 7y + yz + 9z = -63 Add '-9z' to each side of the equation. 7y + yz + 9z + -9z = -63 + -9z Combine like terms: 9z + -9z = 0 7y + yz + 0 = -63 + -9z 7y + yz = -63 + -9z Reorder the terms: 63 + 7y + yz + 9z = -63 + -9z + 63 + 9z Reorder the terms: 63 + 7y + yz + 9z = -63 + 63 + -9z + 9z Combine like terms: -63 + 63 = 0 63 + 7y + yz + 9z = 0 + -9z + 9z 63 + 7y + yz + 9z = -9z + 9z Combine like terms: -9z + 9z = 0 63 + 7y + yz + 9z = 0 The solution to this equation could not be determined.
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