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Simplifying 42 = 2u + 12 Reorder the terms: 42 = 12 + 2u Solving 42 = 12 + 2u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2u' to each side of the equation. 42 + -2u = 12 + 2u + -2u Combine like terms: 2u + -2u = 0 42 + -2u = 12 + 0 42 + -2u = 12 Add '-42' to each side of the equation. 42 + -42 + -2u = 12 + -42 Combine like terms: 42 + -42 = 0 0 + -2u = 12 + -42 -2u = 12 + -42 Combine like terms: 12 + -42 = -30 -2u = -30 Divide each side by '-2'. u = 15 Simplifying u = 15
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