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Simplifying 5(3r) + 3r + r = 508.21 Remove parenthesis around (3r) 5 * 3r + 3r + r = 508.21 Multiply 5 * 3 15r + 3r + r = 508.21 Combine like terms: 15r + 3r = 18r 18r + r = 508.21 Combine like terms: 18r + r = 19r 19r = 508.21 Solving 19r = 508.21 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '19'. r = 26.74789474 Simplifying r = 26.74789474
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