Question

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?


Multiply the second equation by −4 to get −16x − 4y = −80

Multiply the second equation by −1 to get −4x − y = −20

Multiply the first equation by 2 to get 4x + 8y = 28

Multiply the first equation by −1 to get −2x − 4y = −14

Answer 1

2x + 4y = 14
4x + y = 20......multiply by -4
----------------
2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
---------------add
-14x = -66....as u can see, ur y's cancel out

so ur answer is : 1st answer choice <==

** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's

Answer 2

Answer:

The answer is the first choice!

Step-by-step explanation: