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Simplifying 14(2 + r) = 84 (2 * 14 + r * 14) = 84 (28 + 14r) = 84 Solving 28 + 14r = 84 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 14r = 84 + -28 Combine like terms: 28 + -28 = 0 0 + 14r = 84 + -28 14r = 84 + -28 Combine like terms: 84 + -28 = 56 14r = 56 Divide each side by '14'. r = 4 Simplifying r = 4
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