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Simplifying z2 + 21 = 10 Reorder the terms: 21 + z2 = 10 Solving 21 + z2 = 10 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 + -21 + z2 = 10 + -21 Combine like terms: 21 + -21 = 0 0 + z2 = 10 + -21 z2 = 10 + -21 Combine like terms: 10 + -21 = -11 z2 = -11 Simplifying z2 = -11 Reorder the terms: 11 + z2 = -11 + 11 Combine like terms: -11 + 11 = 0 11 + z2 = 0 The solution to this equation could not be determined.
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