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Simplifying 8.2 = 4 + 2r Solving 8.2 = 4 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 8.2 + -2r = 4 + 2r + -2r Combine like terms: 2r + -2r = 0 8.2 + -2r = 4 + 0 8.2 + -2r = 4 Add '-8.2' to each side of the equation. 8.2 + -8.2 + -2r = 4 + -8.2 Combine like terms: 8.2 + -8.2 = 0.0 0.0 + -2r = 4 + -8.2 -2r = 4 + -8.2 Combine like terms: 4 + -8.2 = -4.2 -2r = -4.2 Divide each side by '-2'. r = 2.1 Simplifying r = 2.1
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