SAT Math Multiple Choice Question 16: Answer and Explanation

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Test Information

Question: 16

2. If , what is the value of x ?

  • A. -
  • B.
  • C. 0
  • D. 2

Correct Answer: B

Explanation:

B To solve this equation, use cross multiplication to get (2x)(x + 2) = (x2 + 1)(2). Expand the equation to get 2x2 + 4x = 2x2 + 2. Once you combine like terms, the result is 2x2 - 2x2 + 4x = 2 or 4x = 2. Solve for x by dividing both sides by 4 to get x = , which is (B).

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