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Simplifying 42 = (7z + -3) Reorder the terms: 42 = (-3 + 7z) Remove parenthesis around (-3 + 7z) 42 = -3 + 7z Solving 42 = -3 + 7z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7z' to each side of the equation. 42 + -7z = -3 + 7z + -7z Combine like terms: 7z + -7z = 0 42 + -7z = -3 + 0 42 + -7z = -3 Add '-42' to each side of the equation. 42 + -42 + -7z = -3 + -42 Combine like terms: 42 + -42 = 0 0 + -7z = -3 + -42 -7z = -3 + -42 Combine like terms: -3 + -42 = -45 -7z = -45 Divide each side by '-7'. z = 6.428571429 Simplifying z = 6.428571429
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