Algebra practice question

Answer: A. 5

x + 7 = 12, so x = 5.

Why the other answers are wrong

B. 19

19 adds 7 to 12 instead of subtracting.

C. 2.5

2.5 divides 5 by 2 again.

D. 10

10 divides 12 by 2 and then subtracts 7 from 17, a slip.

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