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Simplifying 5r + 5 = 21 Reorder the terms: 5 + 5r = 21 Solving 5 + 5r = 21 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 5r = 21 + -5 Combine like terms: 5 + -5 = 0 0 + 5r = 21 + -5 5r = 21 + -5 Combine like terms: 21 + -5 = 16 5r = 16 Divide each side by '5'. r = 3.2 Simplifying r = 3.2
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