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Simplifying 9 = 3r + -6 Reorder the terms: 9 = -6 + 3r Solving 9 = -6 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 9 + -3r = -6 + 3r + -3r Combine like terms: 3r + -3r = 0 9 + -3r = -6 + 0 9 + -3r = -6 Add '-9' to each side of the equation. 9 + -9 + -3r = -6 + -9 Combine like terms: 9 + -9 = 0 0 + -3r = -6 + -9 -3r = -6 + -9 Combine like terms: -6 + -9 = -15 -3r = -15 Divide each side by '-3'. r = 5 Simplifying r = 5
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