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Simplifying 0.40r + 0.75 = 0.5 Reorder the terms: 0.75 + 0.40r = 0.5 Solving 0.75 + 0.40r = 0.5 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + 0.40r = 0.5 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + 0.40r = 0.5 + -0.75 0.40r = 0.5 + -0.75 Combine like terms: 0.5 + -0.75 = -0.25 0.40r = -0.25 Divide each side by '0.40'. r = -0.625 Simplifying r = -0.625
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