1966 AMC 12 Problem 5

Attempt Problem 5 of the 1966 AMC 12 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1966 AMC 12 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

5.

The number of values of xx satisfying the equation
2x2−10xx2−5x=x−3 \frac{2x^2-10x}{x^2-5x}=x-3
is:
zero
one
two
three
an integer greater than 33
Answer: A
Concepts:factoringrational equation
Small hint:
Factor numerator and denominator before solving
Big hint:
Do not admit values that make the original denominator zero
Solution:
The denominator requires x≠0x\ne0 and x≠5.x\ne5. On that domain, 2x(x−5)x(x−5)=2. \frac{2x(x-5)}{x(x-5)}=2. The remaining equation 2=x−32=x-3 gives x=5,x=5, which is excluded. Thus there are no solutions.
Therefore, the correct answer is A.
LIVE by Po-Shen Loh
Programs

LIVE Classes

Self-Paced Classes

Stars

Scholarship

About Us

Who Is Po-Shen Loh?

Email Contact

Newsletter

Jobs

Become a Star

For a more Thought Full world.

© 2026 Expii, Inc.