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Simplifying R2 + -18r + 21 = 0 Reorder the terms: 21 + R2 + -18r = 0 Solving 21 + R2 + -18r = 0 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + R2 + -21 + -18r = 0 + -21 Reorder the terms: 21 + -21 + R2 + -18r = 0 + -21 Combine like terms: 21 + -21 = 0 0 + R2 + -18r = 0 + -21 R2 + -18r = 0 + -21 Combine like terms: 0 + -21 = -21 R2 + -18r = -21 Add '18r' to each side of the equation. R2 + -18r + 18r = -21 + 18r Combine like terms: -18r + 18r = 0 R2 + 0 = -21 + 18r R2 = -21 + 18r Simplifying R2 = -21 + 18r Reorder the terms: 21 + R2 + -18r = -21 + 18r + 21 + -18r Reorder the terms: 21 + R2 + -18r = -21 + 21 + 18r + -18r Combine like terms: -21 + 21 = 0 21 + R2 + -18r = 0 + 18r + -18r 21 + R2 + -18r = 18r + -18r Combine like terms: 18r + -18r = 0 21 + R2 + -18r = 0 The solution to this equation could not be determined.
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