Using the substitution or elimination method, find x and y:

Question

line 1: Y -3X= -4

line 2: Y + X =0

and then next i need to find out what is the eqation of a line parallel to line 1 through ( 2, -2)

Answer 1

Hi Leah--

 

First, stack them up like one big fat subtraction problem, and subtract:

 

Y - 3x = -4

-      Y + x =  0

_________________

          -4x = -4

 

If -4x = -4, x must be ... 1

 

Now that you know x = 1, plug it into either of the original equations to find y. (If you get y = -1, you are right!)

 

Hope this helps!

 

Matt in NY