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Simplifying -4 = -4u + 2(u + -3) Reorder the terms: -4 = -4u + 2(-3 + u) -4 = -4u + (-3 * 2 + u * 2) -4 = -4u + (-6 + 2u) Reorder the terms: -4 = -6 + -4u + 2u Combine like terms: -4u + 2u = -2u -4 = -6 + -2u Solving -4 = -6 + -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. -4 + 2u = -6 + -2u + 2u Combine like terms: -2u + 2u = 0 -4 + 2u = -6 + 0 -4 + 2u = -6 Add '4' to each side of the equation. -4 + 4 + 2u = -6 + 4 Combine like terms: -4 + 4 = 0 0 + 2u = -6 + 4 2u = -6 + 4 Combine like terms: -6 + 4 = -2 2u = -2 Divide each side by '2'. u = -1 Simplifying u = -1
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