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Simplifying -30 = -6u + 3(u + -6) Reorder the terms: -30 = -6u + 3(-6 + u) -30 = -6u + (-6 * 3 + u * 3) -30 = -6u + (-18 + 3u) Reorder the terms: -30 = -18 + -6u + 3u Combine like terms: -6u + 3u = -3u -30 = -18 + -3u Solving -30 = -18 + -3u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '3u' to each side of the equation. -30 + 3u = -18 + -3u + 3u Combine like terms: -3u + 3u = 0 -30 + 3u = -18 + 0 -30 + 3u = -18 Add '30' to each side of the equation. -30 + 30 + 3u = -18 + 30 Combine like terms: -30 + 30 = 0 0 + 3u = -18 + 30 3u = -18 + 30 Combine like terms: -18 + 30 = 12 3u = 12 Divide each side by '3'. u = 4 Simplifying u = 4
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