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Simplifying 91 = 7u Solving 91 = 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. 91 + -7u = 7u + -7u Combine like terms: 7u + -7u = 0 91 + -7u = 0 Add '-91' to each side of the equation. 91 + -91 + -7u = 0 + -91 Combine like terms: 91 + -91 = 0 0 + -7u = 0 + -91 -7u = 0 + -91 Combine like terms: 0 + -91 = -91 -7u = -91 Divide each side by '-7'. u = 13 Simplifying u = 13
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