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Simplifying 42 = u * 5 + 7 Reorder the terms for easier multiplication: 42 = 5u + 7 Reorder the terms: 42 = 7 + 5u Solving 42 = 7 + 5u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-5u' to each side of the equation. 42 + -5u = 7 + 5u + -5u Combine like terms: 5u + -5u = 0 42 + -5u = 7 + 0 42 + -5u = 7 Add '-42' to each side of the equation. 42 + -42 + -5u = 7 + -42 Combine like terms: 42 + -42 = 0 0 + -5u = 7 + -42 -5u = 7 + -42 Combine like terms: 7 + -42 = -35 -5u = -35 Divide each side by '-5'. u = 7 Simplifying u = 7
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