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Simplifying 7z + -7 = -4 + 15 Reorder the terms: -7 + 7z = -4 + 15 Combine like terms: -4 + 15 = 11 -7 + 7z = 11 Solving -7 + 7z = 11 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 7z = 11 + 7 Combine like terms: -7 + 7 = 0 0 + 7z = 11 + 7 7z = 11 + 7 Combine like terms: 11 + 7 = 18 7z = 18 Divide each side by '7'. z = 2.571428571 Simplifying z = 2.571428571
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