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