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Simplifying 2r + 2(r + 40) = 375 Reorder the terms: 2r + 2(40 + r) = 375 2r + (40 * 2 + r * 2) = 375 2r + (80 + 2r) = 375 Reorder the terms: 80 + 2r + 2r = 375 Combine like terms: 2r + 2r = 4r 80 + 4r = 375 Solving 80 + 4r = 375 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-80' to each side of the equation. 80 + -80 + 4r = 375 + -80 Combine like terms: 80 + -80 = 0 0 + 4r = 375 + -80 4r = 375 + -80 Combine like terms: 375 + -80 = 295 4r = 295 Divide each side by '4'. r = 73.75 Simplifying r = 73.75
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