Question 9 Answer & Explanation - SAT Algebra

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algebra

Solve: $3x - 9 = x + 3$

Correct Answer: B

Choice Choice B is the correct answer.

Subtract x: $2x - 9 = 3$
Add 9: $2x = 12$
Divide by 2: $x = 6$
Verify: $18 - 9 = 9$ and $6 + 3 = 9$ ✓

Choice Choice C is incorrect because calculation error.

Choice Choice D is incorrect because calculation error.

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