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Simplifying -2 = u + -9 Reorder the terms: -2 = -9 + u Solving -2 = -9 + u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. -2 + -1u = -9 + u + -1u Combine like terms: u + -1u = 0 -2 + -1u = -9 + 0 -2 + -1u = -9 Add '2' to each side of the equation. -2 + 2 + -1u = -9 + 2 Combine like terms: -2 + 2 = 0 0 + -1u = -9 + 2 -1u = -9 + 2 Combine like terms: -9 + 2 = -7 -1u = -7 Divide each side by '-1'. u = 7 Simplifying u = 7
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