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Simplifying 3z * 7 + 6 = -7 Reorder the terms for easier multiplication: 3 * 7z + 6 = -7 Multiply 3 * 7 21z + 6 = -7 Reorder the terms: 6 + 21z = -7 Solving 6 + 21z = -7 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 21z = -7 + -6 Combine like terms: 6 + -6 = 0 0 + 21z = -7 + -6 21z = -7 + -6 Combine like terms: -7 + -6 = -13 21z = -13 Divide each side by '21'. z = -0.619047619 Simplifying z = -0.619047619
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