How can you use the subsitution method to solve the system x+3y=-3 Over 4x+3y=6

Question

How can you use the subsitution method to solve the system x+3y=-3   Over 4x+3y=6

anonymous · Answer

I have to show the steps for the equation using the subsitution method for x+3y=-3
                                                                                                                       4x+3y=6

texaschic101 · Answer

x + 3y = - 3 ---> x = -3y - 3
now sub - 3y - 3 in for x in the second equation to solve for y.

anonymous · Answer

Thanks but how would it be written?

texaschic101 · Answer

One question .....is this the problem....x + 3y = - 3/4x + 3y = 6....you said " over "  or is it  :
x + 3y = - 3
4x + 3y = 6

anonymous · Answer

It's what u wrote last I can't type it like this on my phone

texaschic101 · Answer

ok.....
x + 3y = -3 --> x = - 3y - 3
now sub -3y - 3 in for x
4x + 3y = 6
4(-3y - 3) + 3y = 6 (now distribute the 4 through the parenthesis and solve for y. Do you know how to do that ?

anonymous · Answer

Yep thank u so much :)

texaschic101 · Answer

your welcome :)