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Simplifying 9 = 0.9r Solving 9 = 0.9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.9r' to each side of the equation. 9 + -0.9r = 0.9r + -0.9r Combine like terms: 0.9r + -0.9r = 0.0 9 + -0.9r = 0.0 Add '-9' to each side of the equation. 9 + -9 + -0.9r = 0.0 + -9 Combine like terms: 9 + -9 = 0 0 + -0.9r = 0.0 + -9 -0.9r = 0.0 + -9 Combine like terms: 0.0 + -9 = -9 -0.9r = -9 Divide each side by '-0.9'. r = 10 Simplifying r = 10
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