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Simplifying 3z + 7 + -5 = 42 Reorder the terms: 7 + -5 + 3z = 42 Combine like terms: 7 + -5 = 2 2 + 3z = 42 Solving 2 + 3z = 42 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3z = 42 + -2 Combine like terms: 2 + -2 = 0 0 + 3z = 42 + -2 3z = 42 + -2 Combine like terms: 42 + -2 = 40 3z = 40 Divide each side by '3'. z = 13.33333333 Simplifying z = 13.33333333
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