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Simplifying u2 + 2u + -8 = u2 + 3u + -18 Reorder the terms: -8 + 2u + u2 = u2 + 3u + -18 Reorder the terms: -8 + 2u + u2 = -18 + 3u + u2 Add '-1u2' to each side of the equation. -8 + 2u + u2 + -1u2 = -18 + 3u + u2 + -1u2 Combine like terms: u2 + -1u2 = 0 -8 + 2u + 0 = -18 + 3u + u2 + -1u2 -8 + 2u = -18 + 3u + u2 + -1u2 Combine like terms: u2 + -1u2 = 0 -8 + 2u = -18 + 3u + 0 -8 + 2u = -18 + 3u Solving -8 + 2u = -18 + 3u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-3u' to each side of the equation. -8 + 2u + -3u = -18 + 3u + -3u Combine like terms: 2u + -3u = -1u -8 + -1u = -18 + 3u + -3u Combine like terms: 3u + -3u = 0 -8 + -1u = -18 + 0 -8 + -1u = -18 Add '8' to each side of the equation. -8 + 8 + -1u = -18 + 8 Combine like terms: -8 + 8 = 0 0 + -1u = -18 + 8 -1u = -18 + 8 Combine like terms: -18 + 8 = -10 -1u = -10 Divide each side by '-1'. u = 10 Simplifying u = 10
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