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Simplifying r + 11 = 3 + 9r Reorder the terms: 11 + r = 3 + 9r Solving 11 + r = 3 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. 11 + r + -9r = 3 + 9r + -9r Combine like terms: r + -9r = -8r 11 + -8r = 3 + 9r + -9r Combine like terms: 9r + -9r = 0 11 + -8r = 3 + 0 11 + -8r = 3 Add '-11' to each side of the equation. 11 + -11 + -8r = 3 + -11 Combine like terms: 11 + -11 = 0 0 + -8r = 3 + -11 -8r = 3 + -11 Combine like terms: 3 + -11 = -8 -8r = -8 Divide each side by '-8'. r = 1 Simplifying r = 1
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