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Simplifying -5.4 + 8.1r = 13 + 7.83 Combine like terms: 13 + 7.83 = 20.83 -5.4 + 8.1r = 20.83 Solving -5.4 + 8.1r = 20.83 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5.4' to each side of the equation. -5.4 + 5.4 + 8.1r = 20.83 + 5.4 Combine like terms: -5.4 + 5.4 = 0.0 0.0 + 8.1r = 20.83 + 5.4 8.1r = 20.83 + 5.4 Combine like terms: 20.83 + 5.4 = 26.23 8.1r = 26.23 Divide each side by '8.1'. r = 3.238271605 Simplifying r = 3.238271605
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