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Simplifying 23 + 21z = 0 Solving 23 + 21z = 0 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-23' to each side of the equation. 23 + -23 + 21z = 0 + -23 Combine like terms: 23 + -23 = 0 0 + 21z = 0 + -23 21z = 0 + -23 Combine like terms: 0 + -23 = -23 21z = -23 Divide each side by '21'. z = -1.095238095 Simplifying z = -1.095238095
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