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Simplifying 4 = 2(u + -4) + -8u Reorder the terms: 4 = 2(-4 + u) + -8u 4 = (-4 * 2 + u * 2) + -8u 4 = (-8 + 2u) + -8u Combine like terms: 2u + -8u = -6u 4 = -8 + -6u Solving 4 = -8 + -6u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '6u' to each side of the equation. 4 + 6u = -8 + -6u + 6u Combine like terms: -6u + 6u = 0 4 + 6u = -8 + 0 4 + 6u = -8 Add '-4' to each side of the equation. 4 + -4 + 6u = -8 + -4 Combine like terms: 4 + -4 = 0 0 + 6u = -8 + -4 6u = -8 + -4 Combine like terms: -8 + -4 = -12 6u = -12 Divide each side by '6'. u = -2 Simplifying u = -2
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