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Simplifying 0.2r = 9 + -0.4r Solving 0.2r = 9 + -0.4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '0.4r' to each side of the equation. 0.2r + 0.4r = 9 + -0.4r + 0.4r Combine like terms: 0.2r + 0.4r = 0.6r 0.6r = 9 + -0.4r + 0.4r Combine like terms: -0.4r + 0.4r = 0.0 0.6r = 9 + 0.0 0.6r = 9 Divide each side by '0.6'. r = 15 Simplifying r = 15
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