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Simplifying -2u + 4(u + -3) = -18 Reorder the terms: -2u + 4(-3 + u) = -18 -2u + (-3 * 4 + u * 4) = -18 -2u + (-12 + 4u) = -18 Reorder the terms: -12 + -2u + 4u = -18 Combine like terms: -2u + 4u = 2u -12 + 2u = -18 Solving -12 + 2u = -18 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 2u = -18 + 12 Combine like terms: -12 + 12 = 0 0 + 2u = -18 + 12 2u = -18 + 12 Combine like terms: -18 + 12 = -6 2u = -6 Divide each side by '2'. u = -3 Simplifying u = -3
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