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Simplifying u + -9 = 7u + 7 Reorder the terms: -9 + u = 7u + 7 Reorder the terms: -9 + u = 7 + 7u Solving -9 + u = 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. -9 + u + -7u = 7 + 7u + -7u Combine like terms: u + -7u = -6u -9 + -6u = 7 + 7u + -7u Combine like terms: 7u + -7u = 0 -9 + -6u = 7 + 0 -9 + -6u = 7 Add '9' to each side of the equation. -9 + 9 + -6u = 7 + 9 Combine like terms: -9 + 9 = 0 0 + -6u = 7 + 9 -6u = 7 + 9 Combine like terms: 7 + 9 = 16 -6u = 16 Divide each side by '-6'. u = -2.666666667 Simplifying u = -2.666666667
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