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Simplifying -42 = -7(u + 2) Reorder the terms: -42 = -7(2 + u) -42 = (2 * -7 + u * -7) -42 = (-14 + -7u) Solving -42 = -14 + -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. -42 + 7u = -14 + -7u + 7u Combine like terms: -7u + 7u = 0 -42 + 7u = -14 + 0 -42 + 7u = -14 Add '42' to each side of the equation. -42 + 42 + 7u = -14 + 42 Combine like terms: -42 + 42 = 0 0 + 7u = -14 + 42 7u = -14 + 42 Combine like terms: -14 + 42 = 28 7u = 28 Divide each side by '7'. u = 4 Simplifying u = 4
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