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Simplifying 6r = r + -12 + r Reorder the terms: 6r = -12 + r + r Combine like terms: r + r = 2r 6r = -12 + 2r Solving 6r = -12 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 6r + -2r = -12 + 2r + -2r Combine like terms: 6r + -2r = 4r 4r = -12 + 2r + -2r Combine like terms: 2r + -2r = 0 4r = -12 + 0 4r = -12 Divide each side by '4'. r = -3 Simplifying r = -3
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