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Simplifying 4z * 7 + 4 = 1 Reorder the terms for easier multiplication: 4 * 7z + 4 = 1 Multiply 4 * 7 28z + 4 = 1 Reorder the terms: 4 + 28z = 1 Solving 4 + 28z = 1 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 28z = 1 + -4 Combine like terms: 4 + -4 = 0 0 + 28z = 1 + -4 28z = 1 + -4 Combine like terms: 1 + -4 = -3 28z = -3 Divide each side by '28'. z = -0.1071428571 Simplifying z = -0.1071428571
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