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Simplifying -6u + -39 = -3(u + 7) Reorder the terms: -39 + -6u = -3(u + 7) Reorder the terms: -39 + -6u = -3(7 + u) -39 + -6u = (7 * -3 + u * -3) -39 + -6u = (-21 + -3u) Solving -39 + -6u = -21 + -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. -39 + -6u + 3u = -21 + -3u + 3u Combine like terms: -6u + 3u = -3u -39 + -3u = -21 + -3u + 3u Combine like terms: -3u + 3u = 0 -39 + -3u = -21 + 0 -39 + -3u = -21 Add '39' to each side of the equation. -39 + 39 + -3u = -21 + 39 Combine like terms: -39 + 39 = 0 0 + -3u = -21 + 39 -3u = -21 + 39 Combine like terms: -21 + 39 = 18 -3u = 18 Divide each side by '-3'. u = -6 Simplifying u = -6
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