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Solve the rational equation by applying the five-step strategy for equations with rational expressions.
Step 1 — Identify restricted values. Factor all three denominators: Setting each unique factor to zero gives the restricted values: , , and .
Step 2 — Find the LCD. The factored denominators share the factors , , and . The LCD is .
Step 3 — Clear the fractions. Multiply every term on both sides by the LCD and cancel matching denominator factors: Simplify each term to obtain a fraction-free equation:
Step 4 — Solve the resulting equation. Distribute: . Combine like terms: . Subtract from both sides: . Add to both sides: .
Step 5 — Check. The algebraic solution exactly matches one of the restricted values identified in Step 1. Substituting into the original equation would make two of the denominators equal to zero, which is mathematically undefined. Therefore, is an extraneous solution and must be discarded.
Because the only candidate solution is extraneous, the original equation has no solution.
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Ch.7 Rational Expressions and Functions - Intermediate Algebra @ OpenStax
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