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Simplifying 2z + -1 = z + 7 Reorder the terms: -1 + 2z = z + 7 Reorder the terms: -1 + 2z = 7 + z Solving -1 + 2z = 7 + z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-1z' to each side of the equation. -1 + 2z + -1z = 7 + z + -1z Combine like terms: 2z + -1z = 1z -1 + 1z = 7 + z + -1z Combine like terms: z + -1z = 0 -1 + 1z = 7 + 0 -1 + 1z = 7 Add '1' to each side of the equation. -1 + 1 + 1z = 7 + 1 Combine like terms: -1 + 1 = 0 0 + 1z = 7 + 1 1z = 7 + 1 Combine like terms: 7 + 1 = 8 1z = 8 Divide each side by '1'. z = 8 Simplifying z = 8
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