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Simplifying 9u + -9 = 2(u + -1) Reorder the terms: -9 + 9u = 2(u + -1) Reorder the terms: -9 + 9u = 2(-1 + u) -9 + 9u = (-1 * 2 + u * 2) -9 + 9u = (-2 + 2u) Solving -9 + 9u = -2 + 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. -9 + 9u + -2u = -2 + 2u + -2u Combine like terms: 9u + -2u = 7u -9 + 7u = -2 + 2u + -2u Combine like terms: 2u + -2u = 0 -9 + 7u = -2 + 0 -9 + 7u = -2 Add '9' to each side of the equation. -9 + 9 + 7u = -2 + 9 Combine like terms: -9 + 9 = 0 0 + 7u = -2 + 9 7u = -2 + 9 Combine like terms: -2 + 9 = 7 7u = 7 Divide each side by '7'. u = 1 Simplifying u = 1
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