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Simplifying r3 + 8r2 + 9R + -18 = 0 Reorder the terms: -18 + 9R + 8r2 + r3 = 0 Solving -18 + 9R + 8r2 + r3 = 0 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 9R + 8r2 + 18 + r3 = 0 + 18 Reorder the terms: -18 + 18 + 9R + 8r2 + r3 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 9R + 8r2 + r3 = 0 + 18 9R + 8r2 + r3 = 0 + 18 Combine like terms: 0 + 18 = 18 9R + 8r2 + r3 = 18 Add '-8r2' to each side of the equation. 9R + 8r2 + -8r2 + r3 = 18 + -8r2 Combine like terms: 8r2 + -8r2 = 0 9R + 0 + r3 = 18 + -8r2 9R + r3 = 18 + -8r2 Add '-1r3' to each side of the equation. 9R + r3 + -1r3 = 18 + -8r2 + -1r3 Combine like terms: r3 + -1r3 = 0 9R + 0 = 18 + -8r2 + -1r3 9R = 18 + -8r2 + -1r3 Divide each side by '9'. R = 2 + -0.8888888889r2 + -0.1111111111r3 Simplifying R = 2 + -0.8888888889r2 + -0.1111111111r3
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