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