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Simplifying 7 = u + 6u Combine like terms: u + 6u = 7u 7 = 7u Solving 7 = 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. 7 + -7u = 7u + -7u Combine like terms: 7u + -7u = 0 7 + -7u = 0 Add '-7' to each side of the equation. 7 + -7 + -7u = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -7u = 0 + -7 -7u = 0 + -7 Combine like terms: 0 + -7 = -7 -7u = -7 Divide each side by '-7'. u = 1 Simplifying u = 1
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