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Simplifying 6r + 7 = 13 + 7 Reorder the terms: 7 + 6r = 13 + 7 Combine like terms: 13 + 7 = 20 7 + 6r = 20 Solving 7 + 6r = 20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 6r = 20 + -7 Combine like terms: 7 + -7 = 0 0 + 6r = 20 + -7 6r = 20 + -7 Combine like terms: 20 + -7 = 13 6r = 13 Divide each side by '6'. r = 2.166666667 Simplifying r = 2.166666667
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