What is a possible first step in eliminating a variable in the following system of equations?

4x + 5y = -23
3x + 10y = -14
Choose one answer.
A. Multiply the first equation by -2.
B. Multiply the second equation by -2.
C. Multiply the first equation by 2.
D. Multiply the second equation by 2.

Question

What is a possible first step in eliminating a variable in the following system of equations?

4x + 5y = -23
3x + 10y = -14
Choose one answer.
	A. Multiply the first equation by -2. 	
	B. Multiply the second equation by -2. 	
	C. Multiply the first equation by 2. 	
	D. Multiply the second equation by 2.

anonymous · Answer

If you do the multiplication A would be the best choice because it would come out to be -8x-10y=46 so the -10y in the first will cancel the +10y in the second.