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Simplifying z + 4 = 2z Reorder the terms: 4 + z = 2z Solving 4 + z = 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. 4 + z + -2z = 2z + -2z Combine like terms: z + -2z = -1z 4 + -1z = 2z + -2z Combine like terms: 2z + -2z = 0 4 + -1z = 0 Add '-4' to each side of the equation. 4 + -4 + -1z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1z = 0 + -4 -1z = 0 + -4 Combine like terms: 0 + -4 = -4 -1z = -4 Divide each side by '-1'. z = 4 Simplifying z = 4
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