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Simplifying 4 + -1(2u + -8) = u Reorder the terms: 4 + -1(-8 + 2u) = u 4 + (-8 * -1 + 2u * -1) = u 4 + (8 + -2u) = u Combine like terms: 4 + 8 = 12 12 + -2u = u Solving 12 + -2u = 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. 12 + -2u + -1u = u + -1u Combine like terms: -2u + -1u = -3u 12 + -3u = u + -1u Combine like terms: u + -1u = 0 12 + -3u = 0 Add '-12' to each side of the equation. 12 + -12 + -3u = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -3u = 0 + -12 -3u = 0 + -12 Combine like terms: 0 + -12 = -12 -3u = -12 Divide each side by '-3'. u = 4 Simplifying u = 4
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