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Simplifying 7u + 9 = 7u Reorder the terms: 9 + 7u = 7u Add '-7u' to each side of the equation. 9 + 7u + -7u = 7u + -7u Combine like terms: 7u + -7u = 0 9 + 0 = 7u + -7u 9 = 7u + -7u Combine like terms: 7u + -7u = 0 9 = 0 Solving 9 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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