Solve this system of linear equations? y=-4x & 6x+2y = -3

Question

anonymous · Answer

Substitute -4x for the y in the second system. So it should look something like this:
6x+2(-4x)=-3

anonymous · Answer

Start by distibuting the 2 to the -4x and combining your like terms
So 2(-4x)=-8x
subtract that from 6x
6x-8x=-2x
Now isolate x
-2x=3
x=-2/3

anonymous · Answer

wait how does that work?... Sorry math isnt my strong suit

anonymous · Answer

How can i just put -4x in for y

anonymous · Answer

solve the system of linear equations. doesn't that usually mean combining and solving for x?

anonymous · Answer

Yes
t52q

anonymous · Answer

then yes your can just put -4x in for y :)

anonymous · Answer

Oh so -4x and y are the same thing

anonymous · Answer

No but you are solving a system not one function

anonymous · Answer

That is the only way to solve the problem

anonymous · Answer

Oh I get it!!!!

anonymous · Answer

So sense in the system y=-4x I can substitute it in for y in the other equation

anonymous · Answer

Thanks!!!!

anonymous · Answer

Yes :) Glad you get it and your welcome!

anonymous · Answer

Thanks for helping me work through it..... instead of just giving me the answer