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Simplifying -20 = -8u + 5(u + -7) Reorder the terms: -20 = -8u + 5(-7 + u) -20 = -8u + (-7 * 5 + u * 5) -20 = -8u + (-35 + 5u) Reorder the terms: -20 = -35 + -8u + 5u Combine like terms: -8u + 5u = -3u -20 = -35 + -3u Solving -20 = -35 + -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. -20 + 3u = -35 + -3u + 3u Combine like terms: -3u + 3u = 0 -20 + 3u = -35 + 0 -20 + 3u = -35 Add '20' to each side of the equation. -20 + 20 + 3u = -35 + 20 Combine like terms: -20 + 20 = 0 0 + 3u = -35 + 20 3u = -35 + 20 Combine like terms: -35 + 20 = -15 3u = -15 Divide each side by '3'. u = -5 Simplifying u = -5
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