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Simplifying 13 + 7r = 76 Solving 13 + 7r = 76 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 7r = 76 + -13 Combine like terms: 13 + -13 = 0 0 + 7r = 76 + -13 7r = 76 + -13 Combine like terms: 76 + -13 = 63 7r = 63 Divide each side by '7'. r = 9 Simplifying r = 9
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