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