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Simplifying 7(2r + 7) = 147 Reorder the terms: 7(7 + 2r) = 147 (7 * 7 + 2r * 7) = 147 (49 + 14r) = 147 Solving 49 + 14r = 147 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + 14r = 147 + -49 Combine like terms: 49 + -49 = 0 0 + 14r = 147 + -49 14r = 147 + -49 Combine like terms: 147 + -49 = 98 14r = 98 Divide each side by '14'. r = 7 Simplifying r = 7
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