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Simplifying -5(-5u + 5) + -9u = 2(u + -7) + -7 Reorder the terms: -5(5 + -5u) + -9u = 2(u + -7) + -7 (5 * -5 + -5u * -5) + -9u = 2(u + -7) + -7 (-25 + 25u) + -9u = 2(u + -7) + -7 Combine like terms: 25u + -9u = 16u -25 + 16u = 2(u + -7) + -7 Reorder the terms: -25 + 16u = 2(-7 + u) + -7 -25 + 16u = (-7 * 2 + u * 2) + -7 -25 + 16u = (-14 + 2u) + -7 Reorder the terms: -25 + 16u = -14 + -7 + 2u Combine like terms: -14 + -7 = -21 -25 + 16u = -21 + 2u Solving -25 + 16u = -21 + 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. -25 + 16u + -2u = -21 + 2u + -2u Combine like terms: 16u + -2u = 14u -25 + 14u = -21 + 2u + -2u Combine like terms: 2u + -2u = 0 -25 + 14u = -21 + 0 -25 + 14u = -21 Add '25' to each side of the equation. -25 + 25 + 14u = -21 + 25 Combine like terms: -25 + 25 = 0 0 + 14u = -21 + 25 14u = -21 + 25 Combine like terms: -21 + 25 = 4 14u = 4 Divide each side by '14'. u = 0.2857142857 Simplifying u = 0.2857142857
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