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Simplifying 9z + 4 = -2 + 7z Reorder the terms: 4 + 9z = -2 + 7z Solving 4 + 9z = -2 + 7z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7z' to each side of the equation. 4 + 9z + -7z = -2 + 7z + -7z Combine like terms: 9z + -7z = 2z 4 + 2z = -2 + 7z + -7z Combine like terms: 7z + -7z = 0 4 + 2z = -2 + 0 4 + 2z = -2 Add '-4' to each side of the equation. 4 + -4 + 2z = -2 + -4 Combine like terms: 4 + -4 = 0 0 + 2z = -2 + -4 2z = -2 + -4 Combine like terms: -2 + -4 = -6 2z = -6 Divide each side by '2'. z = -3 Simplifying z = -3
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