Question

What is a possible first step to eliminate the variable x in the following system?
2x – 7y = 3
4x + 5y = –2

Multiply the first equation by 7.

Multiply the first equation by –2.

Multiply the second equation by 2.

Multiply the second equation by –3.

Answer 1

c

Answer 2

thank you !

Answer 3

Careful there Nana3456, look at the second choice also.

Answer 4

Take the first equation and multiply it by 2
-2 (2x-7y = 3)
-4x +14y = -6 now add to the 2nd equation
4x + 5y = -2 Getting:
----------------
19y = -8 or y= -8/19
Now you can substitute that value for y and solve for x.

The point for you to note, is x could be eliminated by multiplying the first equation by -2.

Answer 5

Thank you !