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Simplifying 9r2 + 5 = -66 Reorder the terms: 5 + 9r2 = -66 Solving 5 + 9r2 = -66 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 9r2 = -66 + -5 Combine like terms: 5 + -5 = 0 0 + 9r2 = -66 + -5 9r2 = -66 + -5 Combine like terms: -66 + -5 = -71 9r2 = -71 Divide each side by '9'. r2 = -7.888888889 Simplifying r2 = -7.888888889 Reorder the terms: 7.888888889 + r2 = -7.888888889 + 7.888888889 Combine like terms: -7.888888889 + 7.888888889 = 0.000000000 7.888888889 + r2 = 0.000000000 The solution to this equation could not be determined.
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