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Simplifying 3r2 + -39 + 90 = 0 Reorder the terms: -39 + 90 + 3r2 = 0 Combine like terms: -39 + 90 = 51 51 + 3r2 = 0 Solving 51 + 3r2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-51' to each side of the equation. 51 + -51 + 3r2 = 0 + -51 Combine like terms: 51 + -51 = 0 0 + 3r2 = 0 + -51 3r2 = 0 + -51 Combine like terms: 0 + -51 = -51 3r2 = -51 Divide each side by '3'. r2 = -17 Simplifying r2 = -17 Reorder the terms: 17 + r2 = -17 + 17 Combine like terms: -17 + 17 = 0 17 + r2 = 0 The solution to this equation could not be determined.
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