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Simplifying -3.1 + u * 3 = -7.9 Reorder the terms for easier multiplication: -3.1 + 3u = -7.9 Solving -3.1 + 3u = -7.9 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '3.1' to each side of the equation. -3.1 + 3.1 + 3u = -7.9 + 3.1 Combine like terms: -3.1 + 3.1 = 0.0 0.0 + 3u = -7.9 + 3.1 3u = -7.9 + 3.1 Combine like terms: -7.9 + 3.1 = -4.8 3u = -4.8 Divide each side by '3'. u = -1.6 Simplifying u = -1.6
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