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Simplifying -12 = -2(u + -12) Reorder the terms: -12 = -2(-12 + u) -12 = (-12 * -2 + u * -2) -12 = (24 + -2u) Solving -12 = 24 + -2u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2u' to each side of the equation. -12 + 2u = 24 + -2u + 2u Combine like terms: -2u + 2u = 0 -12 + 2u = 24 + 0 -12 + 2u = 24 Add '12' to each side of the equation. -12 + 12 + 2u = 24 + 12 Combine like terms: -12 + 12 = 0 0 + 2u = 24 + 12 2u = 24 + 12 Combine like terms: 24 + 12 = 36 2u = 36 Divide each side by '2'. u = 18 Simplifying u = 18
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