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Simplifying 5r + -28 + 2r = 49 Reorder the terms: -28 + 5r + 2r = 49 Combine like terms: 5r + 2r = 7r -28 + 7r = 49 Solving -28 + 7r = 49 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 7r = 49 + 28 Combine like terms: -28 + 28 = 0 0 + 7r = 49 + 28 7r = 49 + 28 Combine like terms: 49 + 28 = 77 7r = 77 Divide each side by '7'. r = 11 Simplifying r = 11
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