For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x + 2y = -6
3x + y = 8

-2y + 6

2y - 6

2y + 6

-2y - 6

Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x + 2y = -6
 3x + y = 8

 -2y + 6 

 2y - 6 

 2y + 6 

 -2y - 6

anonymous · Answer

I'm confused on how to do this? HELP!

nikato · Answer

so you have 
-x+2y=-6

whats the first thing you would do to isolate the -x

anonymous · Answer

get rid of y

nikato · Answer

yes. and do you know how to do that?

anonymous · Answer

subtract 2y

nikato · Answer

correct.
and now, what would be your equation after subtraction 2y on both sides

anonymous · Answer

-x=-2y-6

nikato · Answer

ok. your next step is to somehow change -x into x.
what would your next step be?

anonymous · Answer

divide by -1

nikato · Answer

you can do that. but i think multiplying by -1 on both sides would be easier

anonymous · Answer

thanks for the help