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Simplifying 2z + -21 = 42 + 92 Reorder the terms: -21 + 2z = 42 + 92 Combine like terms: 42 + 92 = 134 -21 + 2z = 134 Solving -21 + 2z = 134 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 2z = 134 + 21 Combine like terms: -21 + 21 = 0 0 + 2z = 134 + 21 2z = 134 + 21 Combine like terms: 134 + 21 = 155 2z = 155 Divide each side by '2'. z = 77.5 Simplifying z = 77.5
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