Given the system of equations presented here:
2x + 4y = 14
4x + y = 20
Which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated?
A. Multiply the second equation by −4 to get −16x − 4y = −80
B.Multiply the second equation by −1 to get −4x − y = −20
C.Multiply the first equation by 2 to get 4x + 8y = 28
D.Multiply the first equation by −1 to get −2x − 4y = −14

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Multiply the first equation by 2
so when you subtract 4x - 4x
x is eliminated

ok Can you show me step by step i am really confused.

when you multiply
2x + 4y = 14
by 2 you get
4x + 8y = 28

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