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Simplifying -3.2 = -0.8u + 0.4u Combine like terms: -0.8u + 0.4u = -0.4u -3.2 = -0.4u Solving -3.2 = -0.4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.4u' to each side of the equation. -3.2 + 0.4u = -0.4u + 0.4u Combine like terms: -0.4u + 0.4u = 0.0 -3.2 + 0.4u = 0.0 Add '3.2' to each side of the equation. -3.2 + 3.2 + 0.4u = 0.0 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + 0.4u = 0.0 + 3.2 0.4u = 0.0 + 3.2 Combine like terms: 0.0 + 3.2 = 3.2 0.4u = 3.2 Divide each side by '0.4'. u = 8 Simplifying u = 8
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