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Simplifying -1.5(1 + -1.5r) = 1.87695 + 1.2r (1 * -1.5 + -1.5r * -1.5) = 1.87695 + 1.2r (-1.5 + 2.25r) = 1.87695 + 1.2r Solving -1.5 + 2.25r = 1.87695 + 1.2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1.2r' to each side of the equation. -1.5 + 2.25r + -1.2r = 1.87695 + 1.2r + -1.2r Combine like terms: 2.25r + -1.2r = 1.05r -1.5 + 1.05r = 1.87695 + 1.2r + -1.2r Combine like terms: 1.2r + -1.2r = 0.0 -1.5 + 1.05r = 1.87695 + 0.0 -1.5 + 1.05r = 1.87695 Add '1.5' to each side of the equation. -1.5 + 1.5 + 1.05r = 1.87695 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 1.05r = 1.87695 + 1.5 1.05r = 1.87695 + 1.5 Combine like terms: 1.87695 + 1.5 = 3.37695 1.05r = 3.37695 Divide each side by '1.05'. r = 3.216142857 Simplifying r = 3.216142857
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