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Simplifying 7z + 15 + 8u = 0 Reorder the terms: 15 + 8u + 7z = 0 Solving 15 + 8u + 7z = 0 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + 8u + -15 + 7z = 0 + -15 Reorder the terms: 15 + -15 + 8u + 7z = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 8u + 7z = 0 + -15 8u + 7z = 0 + -15 Combine like terms: 0 + -15 = -15 8u + 7z = -15 Add '-7z' to each side of the equation. 8u + 7z + -7z = -15 + -7z Combine like terms: 7z + -7z = 0 8u + 0 = -15 + -7z 8u = -15 + -7z Divide each side by '8'. u = -1.875 + -0.875z Simplifying u = -1.875 + -0.875z
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