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Simplifying 8r + 11 = 21 + 6r Reorder the terms: 11 + 8r = 21 + 6r Solving 11 + 8r = 21 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 11 + 8r + -6r = 21 + 6r + -6r Combine like terms: 8r + -6r = 2r 11 + 2r = 21 + 6r + -6r Combine like terms: 6r + -6r = 0 11 + 2r = 21 + 0 11 + 2r = 21 Add '-11' to each side of the equation. 11 + -11 + 2r = 21 + -11 Combine like terms: 11 + -11 = 0 0 + 2r = 21 + -11 2r = 21 + -11 Combine like terms: 21 + -11 = 10 2r = 10 Divide each side by '2'. r = 5 Simplifying r = 5
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