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Simplifying (Z + 7)(z + -3) = 0 Reorder the terms: (7 + Z)(z + -3) = 0 Reorder the terms: (7 + Z)(-3 + z) = 0 Multiply (7 + Z) * (-3 + z) (7(-3 + z) + Z(-3 + z)) = 0 ((-3 * 7 + z * 7) + Z(-3 + z)) = 0 ((-21 + 7z) + Z(-3 + z)) = 0 (-21 + 7z + (-3 * Z + z * Z)) = 0 (-21 + 7z + (-3Z + zZ)) = 0 Reorder the terms: (-21 + -3Z + 7z + zZ) = 0 (-21 + -3Z + 7z + zZ) = 0 Solving -21 + -3Z + 7z + zZ = 0 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -3Z + 7z + 21 + zZ = 0 + 21 Reorder the terms: -21 + 21 + -3Z + 7z + zZ = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -3Z + 7z + zZ = 0 + 21 -3Z + 7z + zZ = 0 + 21 Combine like terms: 0 + 21 = 21 -3Z + 7z + zZ = 21 Add '-7z' to each side of the equation. -3Z + 7z + -7z + zZ = 21 + -7z Combine like terms: 7z + -7z = 0 -3Z + 0 + zZ = 21 + -7z -3Z + zZ = 21 + -7z Reorder the terms: -21 + -3Z + 7z + zZ = 21 + -7z + -21 + 7z Reorder the terms: -21 + -3Z + 7z + zZ = 21 + -21 + -7z + 7z Combine like terms: 21 + -21 = 0 -21 + -3Z + 7z + zZ = 0 + -7z + 7z -21 + -3Z + 7z + zZ = -7z + 7z Combine like terms: -7z + 7z = 0 -21 + -3Z + 7z + zZ = 0 The solution to this equation could not be determined.
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