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Simplifying -3r = 8 + -5r + -12 Reorder the terms: -3r = 8 + -12 + -5r Combine like terms: 8 + -12 = -4 -3r = -4 + -5r Solving -3r = -4 + -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. -3r + 5r = -4 + -5r + 5r Combine like terms: -3r + 5r = 2r 2r = -4 + -5r + 5r Combine like terms: -5r + 5r = 0 2r = -4 + 0 2r = -4 Divide each side by '2'. r = -2 Simplifying r = -2
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