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Simplifying -42 = -7z Solving -42 = -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. -42 + 7z = -7z + 7z Combine like terms: -7z + 7z = 0 -42 + 7z = 0 Add '42' to each side of the equation. -42 + 42 + 7z = 0 + 42 Combine like terms: -42 + 42 = 0 0 + 7z = 0 + 42 7z = 0 + 42 Combine like terms: 0 + 42 = 42 7z = 42 Divide each side by '7'. z = 6 Simplifying z = 6
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