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Simplifying -3.9z + 2.8 = 9.3 Reorder the terms: 2.8 + -3.9z = 9.3 Solving 2.8 + -3.9z = 9.3 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-2.8' to each side of the equation. 2.8 + -2.8 + -3.9z = 9.3 + -2.8 Combine like terms: 2.8 + -2.8 = 0.0 0.0 + -3.9z = 9.3 + -2.8 -3.9z = 9.3 + -2.8 Combine like terms: 9.3 + -2.8 = 6.5 -3.9z = 6.5 Divide each side by '-3.9'. z = -1.666666667 Simplifying z = -1.666666667
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