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Simplifying -1(2z + 7) = 13 Reorder the terms: -1(7 + 2z) = 13 (7 * -1 + 2z * -1) = 13 (-7 + -2z) = 13 Solving -7 + -2z = 13 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -2z = 13 + 7 Combine like terms: -7 + 7 = 0 0 + -2z = 13 + 7 -2z = 13 + 7 Combine like terms: 13 + 7 = 20 -2z = 20 Divide each side by '-2'. z = -10 Simplifying z = -10
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