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Simplifying -4(u + 5) + -3u = 0 Reorder the terms: -4(5 + u) + -3u = 0 (5 * -4 + u * -4) + -3u = 0 (-20 + -4u) + -3u = 0 Combine like terms: -4u + -3u = -7u -20 + -7u = 0 Solving -20 + -7u = 0 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -7u = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -7u = 0 + 20 -7u = 0 + 20 Combine like terms: 0 + 20 = 20 -7u = 20 Divide each side by '-7'. u = -2.857142857 Simplifying u = -2.857142857
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