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Simplifying -3u + -15 = 3(u + -1) Reorder the terms: -15 + -3u = 3(u + -1) Reorder the terms: -15 + -3u = 3(-1 + u) -15 + -3u = (-1 * 3 + u * 3) -15 + -3u = (-3 + 3u) Solving -15 + -3u = -3 + 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. -15 + -3u + -3u = -3 + 3u + -3u Combine like terms: -3u + -3u = -6u -15 + -6u = -3 + 3u + -3u Combine like terms: 3u + -3u = 0 -15 + -6u = -3 + 0 -15 + -6u = -3 Add '15' to each side of the equation. -15 + 15 + -6u = -3 + 15 Combine like terms: -15 + 15 = 0 0 + -6u = -3 + 15 -6u = -3 + 15 Combine like terms: -3 + 15 = 12 -6u = 12 Divide each side by '-6'. u = -2 Simplifying u = -2
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