Question 9 Answer & Explanation - SAT Algebra

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algebra

If $3x + 2y = 18$ and $y = x + 4$ , what is $x$ ?

Correct Answer: D

Choice Bhoice C is the correct answer.

Substitute: $3x + 2(x + 4) = 18$
Distribute: $3x + 2x + 8 = 18$
Combine: $5x + 8 = 18$
Subtract 8: $5x = 10$
Divide by 5: $x = 2$

Choice Bhoice D is incorrect because calculation error.

Choice Bhoice A is incorrect because calculation error.

Choice Bhoice D is incorrect because calculation error.

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