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Simplifying 7r + 28r + 28 = 0 Reorder the terms: 28 + 7r + 28r = 0 Combine like terms: 7r + 28r = 35r 28 + 35r = 0 Solving 28 + 35r = 0 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 + 35r = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 35r = 0 + -28 35r = 0 + -28 Combine like terms: 0 + -28 = -28 35r = -28 Divide each side by '35'. r = -0.8 Simplifying r = -0.8
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