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Simplifying 7u + -1 = 4(u + -7) Reorder the terms: -1 + 7u = 4(u + -7) Reorder the terms: -1 + 7u = 4(-7 + u) -1 + 7u = (-7 * 4 + u * 4) -1 + 7u = (-28 + 4u) Solving -1 + 7u = -28 + 4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4u' to each side of the equation. -1 + 7u + -4u = -28 + 4u + -4u Combine like terms: 7u + -4u = 3u -1 + 3u = -28 + 4u + -4u Combine like terms: 4u + -4u = 0 -1 + 3u = -28 + 0 -1 + 3u = -28 Add '1' to each side of the equation. -1 + 1 + 3u = -28 + 1 Combine like terms: -1 + 1 = 0 0 + 3u = -28 + 1 3u = -28 + 1 Combine like terms: -28 + 1 = -27 3u = -27 Divide each side by '3'. u = -9 Simplifying u = -9
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