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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