Select the best possible first step to solving the system by first eliminating the y variable.

5x – y = 5
7x – 3y = –1

Multiply the first equation by –3.

Multiply the second equation by –3.

Multiply the first equation by 3.

Multiply the second equation by 3.

Question

Select the best possible first step to solving the system by first eliminating the y variable.

5x – y = 5
7x – 3y = –1

 Multiply the first equation by –3.

 Multiply the second equation by –3.

 Multiply the first equation by 3.

 Multiply the second equation by 3.

anonymous · Answer

It should be 'A' Multiply the first equation by -3
Because
-3(5x – y = 5)
15x+3y=-15


     -15x+3y=-15
        7x – 3y = –1
     ========
       -8x      =-16