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Simplifying -4 = 8 + u Solving -4 = 8 + u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. -4 + -1u = 8 + u + -1u Combine like terms: u + -1u = 0 -4 + -1u = 8 + 0 -4 + -1u = 8 Add '4' to each side of the equation. -4 + 4 + -1u = 8 + 4 Combine like terms: -4 + 4 = 0 0 + -1u = 8 + 4 -1u = 8 + 4 Combine like terms: 8 + 4 = 12 -1u = 12 Divide each side by '-1'. u = -12 Simplifying u = -12
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