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Simplifying 7 = 2(u + -7) + -5u Reorder the terms: 7 = 2(-7 + u) + -5u 7 = (-7 * 2 + u * 2) + -5u 7 = (-14 + 2u) + -5u Combine like terms: 2u + -5u = -3u 7 = -14 + -3u Solving 7 = -14 + -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. 7 + 3u = -14 + -3u + 3u Combine like terms: -3u + 3u = 0 7 + 3u = -14 + 0 7 + 3u = -14 Add '-7' to each side of the equation. 7 + -7 + 3u = -14 + -7 Combine like terms: 7 + -7 = 0 0 + 3u = -14 + -7 3u = -14 + -7 Combine like terms: -14 + -7 = -21 3u = -21 Divide each side by '3'. u = -7 Simplifying u = -7
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