Question

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?
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

Answer 1

@TrojanPoem

Answer 2

@jabez177

Answer 3

@AloneS

Answer 4

@YoungStudier

Answer 5

Wait what

Answer 6

you subtracted not multiplied

Answer 7

But that is not what the choice is

Answer 8

@pooja195 please help

Answer 9

Mutilpy the first times -7

Answer 10

Multiply the first equation by −7 to get −28x − 7y = −28

Why ?

Because in elimination we try to get rid of any of the variables so you mutiply times the negative of any of the variables coefficient.

Answer 11

Thank you so much!!

Answer 12

any time.