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Simplifying 9 = -12 + 6r Solving 9 = -12 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 9 + -6r = -12 + 6r + -6r Combine like terms: 6r + -6r = 0 9 + -6r = -12 + 0 9 + -6r = -12 Add '-9' to each side of the equation. 9 + -9 + -6r = -12 + -9 Combine like terms: 9 + -9 = 0 0 + -6r = -12 + -9 -6r = -12 + -9 Combine like terms: -12 + -9 = -21 -6r = -21 Divide each side by '-6'. r = 3.5 Simplifying r = 3.5
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