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Simplifying r + 7r + 14 = 30 Reorder the terms: 14 + r + 7r = 30 Combine like terms: r + 7r = 8r 14 + 8r = 30 Solving 14 + 8r = 30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 8r = 30 + -14 Combine like terms: 14 + -14 = 0 0 + 8r = 30 + -14 8r = 30 + -14 Combine like terms: 30 + -14 = 16 8r = 16 Divide each side by '8'. r = 2 Simplifying r = 2
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