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Simplifying (r3 + 2r + 1) + (2r3 + -4) = 0 Reorder the terms: (1 + 2r + r3) + (2r3 + -4) = 0 Remove parenthesis around (1 + 2r + r3) 1 + 2r + r3 + (2r3 + -4) = 0 Reorder the terms: 1 + 2r + r3 + (-4 + 2r3) = 0 Remove parenthesis around (-4 + 2r3) 1 + 2r + r3 + -4 + 2r3 = 0 Reorder the terms: 1 + -4 + 2r + r3 + 2r3 = 0 Combine like terms: 1 + -4 = -3 -3 + 2r + r3 + 2r3 = 0 Combine like terms: r3 + 2r3 = 3r3 -3 + 2r + 3r3 = 0 Solving -3 + 2r + 3r3 = 0 Solving for variable 'r'. The solution to this equation could not be determined.
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