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Simplifying 2z + 9.75 + 7z = -5.15 Reorder the terms: 9.75 + 2z + 7z = -5.15 Combine like terms: 2z + 7z = 9z 9.75 + 9z = -5.15 Solving 9.75 + 9z = -5.15 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-9.75' to each side of the equation. 9.75 + -9.75 + 9z = -5.15 + -9.75 Combine like terms: 9.75 + -9.75 = 0.00 0.00 + 9z = -5.15 + -9.75 9z = -5.15 + -9.75 Combine like terms: -5.15 + -9.75 = -14.9 9z = -14.9 Divide each side by '9'. z = -1.655555556 Simplifying z = -1.655555556
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