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Simplifying 8.1 = r + 5.2 Reorder the terms: 8.1 = 5.2 + r Solving 8.1 = 5.2 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 8.1 + -1r = 5.2 + r + -1r Combine like terms: r + -1r = 0 8.1 + -1r = 5.2 + 0 8.1 + -1r = 5.2 Add '-8.1' to each side of the equation. 8.1 + -8.1 + -1r = 5.2 + -8.1 Combine like terms: 8.1 + -8.1 = 0.0 0.0 + -1r = 5.2 + -8.1 -1r = 5.2 + -8.1 Combine like terms: 5.2 + -8.1 = -2.9 -1r = -2.9 Divide each side by '-1'. r = 2.9 Simplifying r = 2.9
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