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Simplifying -0.5(r + 0.2) = 1.8 Reorder the terms: -0.5(0.2 + r) = 1.8 (0.2 * -0.5 + r * -0.5) = 1.8 (-0.1 + -0.5r) = 1.8 Solving -0.1 + -0.5r = 1.8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + -0.5r = 1.8 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + -0.5r = 1.8 + 0.1 -0.5r = 1.8 + 0.1 Combine like terms: 1.8 + 0.1 = 1.9 -0.5r = 1.9 Divide each side by '-0.5'. r = -3.8 Simplifying r = -3.8
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