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Simplifying (5r3 + -7r2 + 8r) + (-15 + -3r + 3r2) = 0 Reorder the terms: (8r + -7r2 + 5r3) + (-15 + -3r + 3r2) = 0 Remove parenthesis around (8r + -7r2 + 5r3) 8r + -7r2 + 5r3 + (-15 + -3r + 3r2) = 0 Remove parenthesis around (-15 + -3r + 3r2) 8r + -7r2 + 5r3 + -15 + -3r + 3r2 = 0 Reorder the terms: -15 + 8r + -3r + -7r2 + 3r2 + 5r3 = 0 Combine like terms: 8r + -3r = 5r -15 + 5r + -7r2 + 3r2 + 5r3 = 0 Combine like terms: -7r2 + 3r2 = -4r2 -15 + 5r + -4r2 + 5r3 = 0 Solving -15 + 5r + -4r2 + 5r3 = 0 Solving for variable 'r'. The solution to this equation could not be determined.
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