SAT Math · Nonlinear equations in one variable · medium
What is the solution to x+2/x-3 = 5/x-3?
What is the solution to ?
Answer and explanation
Answer: D: No solution
Both fractions share the denominator , so multiply through by it: , giving . But makes the denominator equal to zero in the original equation, so the expression is undefined and the value is extraneous. With no valid candidate left, there is no solution, choice D. Choice A () is the extraneous value that should be rejected. Choice B () copies the right-hand numerator. Choice C () comes from setting the numerator equal to zero. Always check for excluded values after clearing denominators.
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