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Simplifying r2 + 4 = -1 Reorder the terms: 4 + r2 = -1 Solving 4 + r2 = -1 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 + r2 = -1 + -4 Combine like terms: 4 + -4 = 0 0 + r2 = -1 + -4 r2 = -1 + -4 Combine like terms: -1 + -4 = -5 r2 = -5 Simplifying r2 = -5 Reorder the terms: 5 + r2 = -5 + 5 Combine like terms: -5 + 5 = 0 5 + r2 = 0 The solution to this equation could not be determined.
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