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Simplifying -15 = -5u + 8(u + -3) Reorder the terms: -15 = -5u + 8(-3 + u) -15 = -5u + (-3 * 8 + u * 8) -15 = -5u + (-24 + 8u) Reorder the terms: -15 = -24 + -5u + 8u Combine like terms: -5u + 8u = 3u -15 = -24 + 3u Solving -15 = -24 + 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 = -24 + 3u + -3u Combine like terms: 3u + -3u = 0 -15 + -3u = -24 + 0 -15 + -3u = -24 Add '15' to each side of the equation. -15 + 15 + -3u = -24 + 15 Combine like terms: -15 + 15 = 0 0 + -3u = -24 + 15 -3u = -24 + 15 Combine like terms: -24 + 15 = -9 -3u = -9 Divide each side by '-3'. u = 3 Simplifying u = 3
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