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Simplifying 13r + 9 = 8r + -2 Reorder the terms: 9 + 13r = 8r + -2 Reorder the terms: 9 + 13r = -2 + 8r Solving 9 + 13r = -2 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. 9 + 13r + -8r = -2 + 8r + -8r Combine like terms: 13r + -8r = 5r 9 + 5r = -2 + 8r + -8r Combine like terms: 8r + -8r = 0 9 + 5r = -2 + 0 9 + 5r = -2 Add '-9' to each side of the equation. 9 + -9 + 5r = -2 + -9 Combine like terms: 9 + -9 = 0 0 + 5r = -2 + -9 5r = -2 + -9 Combine like terms: -2 + -9 = -11 5r = -11 Divide each side by '5'. r = -2.2 Simplifying r = -2.2
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