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Simplifying 42 + -7u = 36 + u Solving 42 + -7u = 36 + u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. 42 + -7u + -1u = 36 + u + -1u Combine like terms: -7u + -1u = -8u 42 + -8u = 36 + u + -1u Combine like terms: u + -1u = 0 42 + -8u = 36 + 0 42 + -8u = 36 Add '-42' to each side of the equation. 42 + -42 + -8u = 36 + -42 Combine like terms: 42 + -42 = 0 0 + -8u = 36 + -42 -8u = 36 + -42 Combine like terms: 36 + -42 = -6 -8u = -6 Divide each side by '-8'. u = 0.75 Simplifying u = 0.75
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