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Simplifying -54 = -9(2 + 2z) -54 = (2 * -9 + 2z * -9) -54 = (-18 + -18z) Solving -54 = -18 + -18z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '18z' to each side of the equation. -54 + 18z = -18 + -18z + 18z Combine like terms: -18z + 18z = 0 -54 + 18z = -18 + 0 -54 + 18z = -18 Add '54' to each side of the equation. -54 + 54 + 18z = -18 + 54 Combine like terms: -54 + 54 = 0 0 + 18z = -18 + 54 18z = -18 + 54 Combine like terms: -18 + 54 = 36 18z = 36 Divide each side by '18'. z = 2 Simplifying z = 2
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