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Simplifying 5u + 7 = 20 + -8u Reorder the terms: 7 + 5u = 20 + -8u Solving 7 + 5u = 20 + -8u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '8u' to each side of the equation. 7 + 5u + 8u = 20 + -8u + 8u Combine like terms: 5u + 8u = 13u 7 + 13u = 20 + -8u + 8u Combine like terms: -8u + 8u = 0 7 + 13u = 20 + 0 7 + 13u = 20 Add '-7' to each side of the equation. 7 + -7 + 13u = 20 + -7 Combine like terms: 7 + -7 = 0 0 + 13u = 20 + -7 13u = 20 + -7 Combine like terms: 20 + -7 = 13 13u = 13 Divide each side by '13'. u = 1 Simplifying u = 1
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