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Simplifying -12 + 8 = 6u + -4u Combine like terms: -12 + 8 = -4 -4 = 6u + -4u Combine like terms: 6u + -4u = 2u -4 = 2u Solving -4 = 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 = 2u + -2u Combine like terms: 2u + -2u = 0 -4 + -2u = 0 Add '4' to each side of the equation. -4 + 4 + -2u = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -2u = 0 + 4 -2u = 0 + 4 Combine like terms: 0 + 4 = 4 -2u = 4 Divide each side by '-2'. u = -2 Simplifying u = -2
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