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Simplifying 23 = 6r + 7r Combine like terms: 6r + 7r = 13r 23 = 13r Solving 23 = 13r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-13r' to each side of the equation. 23 + -13r = 13r + -13r Combine like terms: 13r + -13r = 0 23 + -13r = 0 Add '-23' to each side of the equation. 23 + -23 + -13r = 0 + -23 Combine like terms: 23 + -23 = 0 0 + -13r = 0 + -23 -13r = 0 + -23 Combine like terms: 0 + -23 = -23 -13r = -23 Divide each side by '-13'. r = 1.769230769 Simplifying r = 1.769230769
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