SAT Math Multiple Choice Practice Question 24: Answer and Explanation

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Question: 24

2. If the square of x is 12 less than the product of x and 5, which of the following expressions could be used to solve for x?

A. x2 = 5x - 12
B. x2 = 12 - 5x
C. 2x = 12 - 5x
D. 2x = 5x - 12
E. x2 = (x + 5) - 12

Correct Answer: A

Explanation:

A. Don't fall for the old "less than" trick. "Twelve less than something" is the thing minus 12 — not the other way around. So you want an expression that says "x squared is 5 times x minus 12," and (A) is the winner.

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