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Simplifying 8u + -9 = 7u Reorder the terms: -9 + 8u = 7u Solving -9 + 8u = 7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7u' to each side of the equation. -9 + 8u + -7u = 7u + -7u Combine like terms: 8u + -7u = 1u -9 + 1u = 7u + -7u Combine like terms: 7u + -7u = 0 -9 + 1u = 0 Add '9' to each side of the equation. -9 + 9 + 1u = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 1u = 0 + 9 1u = 0 + 9 Combine like terms: 0 + 9 = 9 1u = 9 Divide each side by '1'. u = 9 Simplifying u = 9
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