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

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

You will multiply the first equation by -3 because to eliminate "y" you need a positive 3 y so when adding the two equation it will be like ;= +(3y-3y) =0,but guess what you can also get the same answer by multiplying by +3 but you will have to change the signs to "-" when adding both equations,but it will be more like subtracting,so it cant be your answer,because the question asks "by adding"

Multiply 1st equation by -3

multiply by -3

wow.

multiply the first equation by -3