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Simplifying r2 + -9r = -9r + -10 Reorder the terms: -9r + r2 = -9r + -10 Reorder the terms: -9r + r2 = -10 + -9r Add '9r' to each side of the equation. -9r + 9r + r2 = -10 + -9r + 9r Combine like terms: -9r + 9r = 0 0 + r2 = -10 + -9r + 9r r2 = -10 + -9r + 9r Combine like terms: -9r + 9r = 0 r2 = -10 + 0 r2 = -10 Solving r2 = -10 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Simplifying r2 = -10 Reorder the terms: 10 + r2 = -10 + 10 Combine like terms: -10 + 10 = 0 10 + r2 = 0 The solution to this equation could not be determined.
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