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Simplifying 7z + -7 = 2z + -2 Reorder the terms: -7 + 7z = 2z + -2 Reorder the terms: -7 + 7z = -2 + 2z Solving -7 + 7z = -2 + 2z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-2z' to each side of the equation. -7 + 7z + -2z = -2 + 2z + -2z Combine like terms: 7z + -2z = 5z -7 + 5z = -2 + 2z + -2z Combine like terms: 2z + -2z = 0 -7 + 5z = -2 + 0 -7 + 5z = -2 Add '7' to each side of the equation. -7 + 7 + 5z = -2 + 7 Combine like terms: -7 + 7 = 0 0 + 5z = -2 + 7 5z = -2 + 7 Combine like terms: -2 + 7 = 5 5z = 5 Divide each side by '5'. z = 1 Simplifying z = 1
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