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Simplifying r + r + 2 = 100 Reorder the terms: 2 + r + r = 100 Combine like terms: r + r = 2r 2 + 2r = 100 Solving 2 + 2r = 100 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 2r = 100 + -2 Combine like terms: 2 + -2 = 0 0 + 2r = 100 + -2 2r = 100 + -2 Combine like terms: 100 + -2 = 98 2r = 98 Divide each side by '2'. r = 49 Simplifying r = 49
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