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Simplifying 4r + 3r + -9 = 76 Reorder the terms: -9 + 4r + 3r = 76 Combine like terms: 4r + 3r = 7r -9 + 7r = 76 Solving -9 + 7r = 76 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 7r = 76 + 9 Combine like terms: -9 + 9 = 0 0 + 7r = 76 + 9 7r = 76 + 9 Combine like terms: 76 + 9 = 85 7r = 85 Divide each side by '7'. r = 12.14285714 Simplifying r = 12.14285714
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