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Simplifying 4 = z + 12 Reorder the terms: 4 = 12 + z Solving 4 = 12 + 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. 4 + -1z = 12 + z + -1z Combine like terms: z + -1z = 0 4 + -1z = 12 + 0 4 + -1z = 12 Add '-4' to each side of the equation. 4 + -4 + -1z = 12 + -4 Combine like terms: 4 + -4 = 0 0 + -1z = 12 + -4 -1z = 12 + -4 Combine like terms: 12 + -4 = 8 -1z = 8 Divide each side by '-1'. z = -8 Simplifying z = -8
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