What is a possible first step to eliminate a variable in the following system?

2x - 3y = -1
3x - 4y = -3

Multiply the first equation by -3 and the second equation by 2.
Multiply the first equation by 3 and the second equation by -2.
Multiply the first equation by 4 and the second equation by 3.
All of the above.

Question

What is a possible first step to eliminate a variable in the following system?

2x - 3y = -1
3x - 4y = -3
 	
	Multiply the first equation by -3 and the second equation by 2.
	Multiply the first equation by 3 and the second equation by -2.
	Multiply the first equation by 4 and the second equation by 3.
	All of the above.

anonymous · Answer

Why not try them all out yourself?

anonymous · Answer

But if you multiply the first equation by -3, you'll get -6x, and multiply the second equation by 2, you'll get 6x, so the first one is the correct option, since they cancel each other out.