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Simplifying 0.66 + 0.55r = 0.75 Solving 0.66 + 0.55r = 0.75 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.66' to each side of the equation. 0.66 + -0.66 + 0.55r = 0.75 + -0.66 Combine like terms: 0.66 + -0.66 = 0.00 0.00 + 0.55r = 0.75 + -0.66 0.55r = 0.75 + -0.66 Combine like terms: 0.75 + -0.66 = 0.09 0.55r = 0.09 Divide each side by '0.55'. r = 0.1636363636 Simplifying r = 0.1636363636
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