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Simplifying -8u + 6(u + 3) = 20 Reorder the terms: -8u + 6(3 + u) = 20 -8u + (3 * 6 + u * 6) = 20 -8u + (18 + 6u) = 20 Reorder the terms: 18 + -8u + 6u = 20 Combine like terms: -8u + 6u = -2u 18 + -2u = 20 Solving 18 + -2u = 20 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -2u = 20 + -18 Combine like terms: 18 + -18 = 0 0 + -2u = 20 + -18 -2u = 20 + -18 Combine like terms: 20 + -18 = 2 -2u = 2 Divide each side by '-2'. u = -1 Simplifying u = -1
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