PSAT Math Multiple-Choice Practice Question 338

Correct Answer: B

Explanation:

B

Difficulty: Easy

Getting to the Answer: Looking at the coefficients of the two equations, you'll notice that multiplying the second equation by -3 will allow you to eliminate the b terms:

Solving the resulting equation gives a = 4. Choice (B) is the only choice that contains this value for a, so it must be correct.