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Simplifying 40 = r + r(2) Reorder the terms for easier multiplication: 40 = r + 2r Combine like terms: r + 2r = 3r 40 = 3r Solving 40 = 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 40 + -3r = 3r + -3r Combine like terms: 3r + -3r = 0 40 + -3r = 0 Add '-40' to each side of the equation. 40 + -40 + -3r = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -3r = 0 + -40 -3r = 0 + -40 Combine like terms: 0 + -40 = -40 -3r = -40 Divide each side by '-3'. r = 13.33333333 Simplifying r = 13.33333333
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