SAT Math Multiple Choice Practice Question 417: Answer and Explanation

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Question: 417

21. If 2 + a = 2 – a, what is the value of a ?

A. –1
B. 0
C. 1
D. 2
E. 4

Correct Answer: B

Explanation:

B This simple equation should present you with little difficulty, but beware: It is on precisely such questions that your guard might come down and you can become careless! Using Plugging In The Answers is safest. Only B works:

2 + (0) = 2 – (0)
2 = 2

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