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Simplifying 3r + 6 = 9r + -20 Reorder the terms: 6 + 3r = 9r + -20 Reorder the terms: 6 + 3r = -20 + 9r Solving 6 + 3r = -20 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. 6 + 3r + -9r = -20 + 9r + -9r Combine like terms: 3r + -9r = -6r 6 + -6r = -20 + 9r + -9r Combine like terms: 9r + -9r = 0 6 + -6r = -20 + 0 6 + -6r = -20 Add '-6' to each side of the equation. 6 + -6 + -6r = -20 + -6 Combine like terms: 6 + -6 = 0 0 + -6r = -20 + -6 -6r = -20 + -6 Combine like terms: -20 + -6 = -26 -6r = -26 Divide each side by '-6'. r = 4.333333333 Simplifying r = 4.333333333
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