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Simplifying 6.5 = 2r + 8.1 Reorder the terms: 6.5 = 8.1 + 2r Solving 6.5 = 8.1 + 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. 6.5 + -2r = 8.1 + 2r + -2r Combine like terms: 2r + -2r = 0 6.5 + -2r = 8.1 + 0 6.5 + -2r = 8.1 Add '-6.5' to each side of the equation. 6.5 + -6.5 + -2r = 8.1 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + -2r = 8.1 + -6.5 -2r = 8.1 + -6.5 Combine like terms: 8.1 + -6.5 = 1.6 -2r = 1.6 Divide each side by '-2'. r = -0.8 Simplifying r = -0.8
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