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Simplifying 2u + 18 = 16 + -4(u + 7) Reorder the terms: 18 + 2u = 16 + -4(u + 7) Reorder the terms: 18 + 2u = 16 + -4(7 + u) 18 + 2u = 16 + (7 * -4 + u * -4) 18 + 2u = 16 + (-28 + -4u) Combine like terms: 16 + -28 = -12 18 + 2u = -12 + -4u Solving 18 + 2u = -12 + -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. 18 + 2u + 4u = -12 + -4u + 4u Combine like terms: 2u + 4u = 6u 18 + 6u = -12 + -4u + 4u Combine like terms: -4u + 4u = 0 18 + 6u = -12 + 0 18 + 6u = -12 Add '-18' to each side of the equation. 18 + -18 + 6u = -12 + -18 Combine like terms: 18 + -18 = 0 0 + 6u = -12 + -18 6u = -12 + -18 Combine like terms: -12 + -18 = -30 6u = -30 Divide each side by '6'. u = -5 Simplifying u = -5
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