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Simplifying -30 = 4(u + 3) + 3u Reorder the terms: -30 = 4(3 + u) + 3u -30 = (3 * 4 + u * 4) + 3u -30 = (12 + 4u) + 3u Combine like terms: 4u + 3u = 7u -30 = 12 + 7u Solving -30 = 12 + 7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7u' to each side of the equation. -30 + -7u = 12 + 7u + -7u Combine like terms: 7u + -7u = 0 -30 + -7u = 12 + 0 -30 + -7u = 12 Add '30' to each side of the equation. -30 + 30 + -7u = 12 + 30 Combine like terms: -30 + 30 = 0 0 + -7u = 12 + 30 -7u = 12 + 30 Combine like terms: 12 + 30 = 42 -7u = 42 Divide each side by '-7'. u = -6 Simplifying u = -6
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