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Simplifying -7(9z + 2) = 20 Reorder the terms: -7(2 + 9z) = 20 (2 * -7 + 9z * -7) = 20 (-14 + -63z) = 20 Solving -14 + -63z = 20 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + -63z = 20 + 14 Combine like terms: -14 + 14 = 0 0 + -63z = 20 + 14 -63z = 20 + 14 Combine like terms: 20 + 14 = 34 -63z = 34 Divide each side by '-63'. z = -0.5396825397 Simplifying z = -0.5396825397
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