SAT Math Multiple Choice Practice Question 445: Answer and Explanation

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Question: 445

7. If 3x - 5 = 4, what is the value of 9x - 15 ?

A. 3
B. 4
C. 9
D. 12
E. 15

Correct Answer: D

Explanation:

D Use the first equation to solve for x: 3x – 5 = 4, so x = 3. Plug in 3 for x: 9x – 15 = 27 – 15 = 12.

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