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Simplifying 8u + 1 = 7u + -20 Reorder the terms: 1 + 8u = 7u + -20 Reorder the terms: 1 + 8u = -20 + 7u Solving 1 + 8u = -20 + 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. 1 + 8u + -7u = -20 + 7u + -7u Combine like terms: 8u + -7u = 1u 1 + 1u = -20 + 7u + -7u Combine like terms: 7u + -7u = 0 1 + 1u = -20 + 0 1 + 1u = -20 Add '-1' to each side of the equation. 1 + -1 + 1u = -20 + -1 Combine like terms: 1 + -1 = 0 0 + 1u = -20 + -1 1u = -20 + -1 Combine like terms: -20 + -1 = -21 1u = -21 Divide each side by '1'. u = -21 Simplifying u = -21
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