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Simplifying 18 + 7z + 2 = 0 Reorder the terms: 18 + 2 + 7z = 0 Combine like terms: 18 + 2 = 20 20 + 7z = 0 Solving 20 + 7z = 0 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 7z = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 7z = 0 + -20 7z = 0 + -20 Combine like terms: 0 + -20 = -20 7z = -20 Divide each side by '7'. z = -2.857142857 Simplifying z = -2.857142857
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