Question

To solve this system of equations by elimination what operation would we use to eliminate the X variable and find the value of y

-6x-4y=2
-4x-7y=2

Answer 1

Option A is correct.

Explanation:

We have to eliminate x from the given system of equations by solving

-6x -4y=2

-4x-7y=2

We can do this by subtracting 3 times the second equation from 2 times the first equation we get

-12x -8y = 2

12x +21y =- 2

Sign of second equation changed because it is getting subtracted

Since, we got same quantity of x with opposite signs

Hence, it will get cancelled and so eliminated.

Therefore, Option A is correct.