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Simplifying -30 = 2(u + -7) + -4u Reorder the terms: -30 = 2(-7 + u) + -4u -30 = (-7 * 2 + u * 2) + -4u -30 = (-14 + 2u) + -4u Combine like terms: 2u + -4u = -2u -30 = -14 + -2u Solving -30 = -14 + -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. -30 + 2u = -14 + -2u + 2u Combine like terms: -2u + 2u = 0 -30 + 2u = -14 + 0 -30 + 2u = -14 Add '30' to each side of the equation. -30 + 30 + 2u = -14 + 30 Combine like terms: -30 + 30 = 0 0 + 2u = -14 + 30 2u = -14 + 30 Combine like terms: -14 + 30 = 16 2u = 16 Divide each side by '2'. u = 8 Simplifying u = 8
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