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Simplifying -7u + 3(u + 7) = 29 Reorder the terms: -7u + 3(7 + u) = 29 -7u + (7 * 3 + u * 3) = 29 -7u + (21 + 3u) = 29 Reorder the terms: 21 + -7u + 3u = 29 Combine like terms: -7u + 3u = -4u 21 + -4u = 29 Solving 21 + -4u = 29 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -4u = 29 + -21 Combine like terms: 21 + -21 = 0 0 + -4u = 29 + -21 -4u = 29 + -21 Combine like terms: 29 + -21 = 8 -4u = 8 Divide each side by '-4'. u = -2 Simplifying u = -2
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