Given the system of equations presented here: 4x + y = 4 2x + 7y = 28 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? (5 points) multiply the second equation by −1 to get −2x − 7y = −28 multiply the second equation by −4 to get −8x − 28y = −112 multiply the first equation by −7 to get −28x − 7y = −28 multiply the first equation by −2 to get −8x − 2y = −8

multiply the first equation by - 7 to get - 28x - 7y = - 28

Step-by-step explanation:

This then results on  adding the 2 equations as

- 24x = 0 ⇒ x = 0 and y = 4

solution to system is (0, 4 )

multiply the first equatiom by -7 to get -28x -7y =-28

Step-by-step explanation:

4x + y = 4 (1)

2x + 7y = 28 (2)

multiply equation (1) by -7

-28x - 7y = -28 (3)

add equation (2) and (3)

-24x = 0

Divide bothside by 24

x =0

substitute x= 0 in equation(1)

4x +y = 4

4(0) + y = 4

y = 4

a. 19,958,400

step-by-step explanation:

hope this