Which of the following choices is equivalent when solving the system by the elimination method? x + 2y = 1
2x + y = 12

a)x + 2y = 1
-4x − 2y = -24

b)x + 2y = 1
-2x − 2y = -1

c)x + 2y = 1
4x − 2y = 24

d)None of these choices are correct.

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