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Simplifying 8r + 4 = 5r + 15 Reorder the terms: 4 + 8r = 5r + 15 Reorder the terms: 4 + 8r = 15 + 5r Solving 4 + 8r = 15 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. 4 + 8r + -5r = 15 + 5r + -5r Combine like terms: 8r + -5r = 3r 4 + 3r = 15 + 5r + -5r Combine like terms: 5r + -5r = 0 4 + 3r = 15 + 0 4 + 3r = 15 Add '-4' to each side of the equation. 4 + -4 + 3r = 15 + -4 Combine like terms: 4 + -4 = 0 0 + 3r = 15 + -4 3r = 15 + -4 Combine like terms: 15 + -4 = 11 3r = 11 Divide each side by '3'. r = 3.666666667 Simplifying r = 3.666666667
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