Question

A system of two equations is shown below. What will you need to multiply the top equation by in order to solve this system using the elimination method?
X+2y=11
6x+4y=34
A.6
B.2
C.-2
D.-4

Answer 1

Both a and b can be the answer since you can eliminate a variable using both of them. The answer is below

Answer 2

For this case we have the following system equations:

$x + 2y = 11\\6x + 4y = 34$

To use the elimination method we must multiply the first by -2. So:

$-2x-4y = -22\\6x + 4y = 34$

In this way, if we add the equations, the variable y is eliminated.

Answer:

-2

Option C