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Simplifying 9 + 27r = 8 + -12r Solving 9 + 27r = 8 + -12r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12r' to each side of the equation. 9 + 27r + 12r = 8 + -12r + 12r Combine like terms: 27r + 12r = 39r 9 + 39r = 8 + -12r + 12r Combine like terms: -12r + 12r = 0 9 + 39r = 8 + 0 9 + 39r = 8 Add '-9' to each side of the equation. 9 + -9 + 39r = 8 + -9 Combine like terms: 9 + -9 = 0 0 + 39r = 8 + -9 39r = 8 + -9 Combine like terms: 8 + -9 = -1 39r = -1 Divide each side by '39'. r = -0.02564102564 Simplifying r = -0.02564102564
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