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Simplifying Z2 + -4z = 21 Solving Z2 + -4z = 21 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '4z' to each side of the equation. Z2 + -4z + 4z = 21 + 4z Combine like terms: -4z + 4z = 0 Z2 + 0 = 21 + 4z Z2 = 21 + 4z Simplifying Z2 = 21 + 4z Reorder the terms: -21 + Z2 + -4z = 21 + 4z + -21 + -4z Reorder the terms: -21 + Z2 + -4z = 21 + -21 + 4z + -4z Combine like terms: 21 + -21 = 0 -21 + Z2 + -4z = 0 + 4z + -4z -21 + Z2 + -4z = 4z + -4z Combine like terms: 4z + -4z = 0 -21 + Z2 + -4z = 0 The solution to this equation could not be determined.
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