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