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Simplifying 3(2r + 5) + 2r = 55 Reorder the terms: 3(5 + 2r) + 2r = 55 (5 * 3 + 2r * 3) + 2r = 55 (15 + 6r) + 2r = 55 Combine like terms: 6r + 2r = 8r 15 + 8r = 55 Solving 15 + 8r = 55 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 8r = 55 + -15 Combine like terms: 15 + -15 = 0 0 + 8r = 55 + -15 8r = 55 + -15 Combine like terms: 55 + -15 = 40 8r = 40 Divide each side by '8'. r = 5 Simplifying r = 5
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