Question

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?

x − y = 6
4x − 3y = 12

Add the two equations together

Multiply the first equation by −4

Multiply the first equation by 3

Multiply the first equation by −3

Answer 1

Fourth option multiply the first equation by -3
because x − y = 6 when we multiply it becomes
-3(x-y=6)
-3x+3y=-18

When we add them y can be eliminated
-3x+3y=-18
4x − 3y = 12
------------
x=-6

I hope I'm clear :)