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Simplifying 2u + -9 = -1 Reorder the terms: -9 + 2u = -1 Solving -9 + 2u = -1 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2u = -1 + 9 Combine like terms: -9 + 9 = 0 0 + 2u = -1 + 9 2u = -1 + 9 Combine like terms: -1 + 9 = 8 2u = 8 Divide each side by '2'. u = 4 Simplifying u = 4
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