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Simplifying 5z + 21 = 19 Reorder the terms: 21 + 5z = 19 Solving 21 + 5z = 19 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 5z = 19 + -21 Combine like terms: 21 + -21 = 0 0 + 5z = 19 + -21 5z = 19 + -21 Combine like terms: 19 + -21 = -2 5z = -2 Divide each side by '5'. z = -0.4 Simplifying z = -0.4
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