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Simplifying 3(r + 3) = r + 11 Reorder the terms: 3(3 + r) = r + 11 (3 * 3 + r * 3) = r + 11 (9 + 3r) = r + 11 Reorder the terms: 9 + 3r = 11 + r Solving 9 + 3r = 11 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 9 + 3r + -1r = 11 + r + -1r Combine like terms: 3r + -1r = 2r 9 + 2r = 11 + r + -1r Combine like terms: r + -1r = 0 9 + 2r = 11 + 0 9 + 2r = 11 Add '-9' to each side of the equation. 9 + -9 + 2r = 11 + -9 Combine like terms: 9 + -9 = 0 0 + 2r = 11 + -9 2r = 11 + -9 Combine like terms: 11 + -9 = 2 2r = 2 Divide each side by '2'. r = 1 Simplifying r = 1
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