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Simplifying -4 + 1r = -4 Add '4' to each side of the equation. -4 + 4 + 1r = -4 + 4 Combine like terms: -4 + 4 = 0 0 + 1r = -4 + 4 1r = -4 + 4 Combine like terms: -4 + 4 = 0 1r = 0 Solving 1r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '1'. r = 0 Simplifying r = 0
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