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Simplifying 8u = 21u Solving 8u = 21u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-21u' to each side of the equation. 8u + -21u = 21u + -21u Combine like terms: 8u + -21u = -13u -13u = 21u + -21u Combine like terms: 21u + -21u = 0 -13u = 0 Divide each side by '-13'. u = 0 Simplifying u = 0
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