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Simplifying (U + 2) * 7 = 21 Reorder the terms: (2 + U) * 7 = 21 Reorder the terms for easier multiplication: 7(2 + U) = 21 (2 * 7 + U * 7) = 21 (14 + 7U) = 21 Solving 14 + 7U = 21 Solving for variable 'U'. Move all terms containing U to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 7U = 21 + -14 Combine like terms: 14 + -14 = 0 0 + 7U = 21 + -14 7U = 21 + -14 Combine like terms: 21 + -14 = 7 7U = 7 Divide each side by '7'. U = 1 Simplifying U = 1
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