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Simplifying 28 = -7z Solving 28 = -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. 28 + 7z = -7z + 7z Combine like terms: -7z + 7z = 0 28 + 7z = 0 Add '-28' to each side of the equation. 28 + -28 + 7z = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 7z = 0 + -28 7z = 0 + -28 Combine like terms: 0 + -28 = -28 7z = -28 Divide each side by '7'. z = -4 Simplifying z = -4
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