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Simplifying (3r + 1) + (r + 2) = 65 Reorder the terms: (1 + 3r) + (r + 2) = 65 Remove parenthesis around (1 + 3r) 1 + 3r + (r + 2) = 65 Reorder the terms: 1 + 3r + (2 + r) = 65 Remove parenthesis around (2 + r) 1 + 3r + 2 + r = 65 Reorder the terms: 1 + 2 + 3r + r = 65 Combine like terms: 1 + 2 = 3 3 + 3r + r = 65 Combine like terms: 3r + r = 4r 3 + 4r = 65 Solving 3 + 4r = 65 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 4r = 65 + -3 Combine like terms: 3 + -3 = 0 0 + 4r = 65 + -3 4r = 65 + -3 Combine like terms: 65 + -3 = 62 4r = 62 Divide each side by '4'. r = 15.5 Simplifying r = 15.5
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