SOLUTION: Hi, I just need to know how you solve x-y=3 and x-2y=3 for Graphing Systems of Equations. I have tried to do it but I forgot the formula/how to do it and I really need your help!!!

Algebra ->  Graphs -> SOLUTION: Hi, I just need to know how you solve x-y=3 and x-2y=3 for Graphing Systems of Equations. I have tried to do it but I forgot the formula/how to do it and I really need your help!!!      Log On


   

Question 261947: Hi, I just need to know how you solve x-y=3 and x-2y=3 for Graphing Systems of Equations. I have tried to do it but I forgot the formula/how to do it and I really need your help!!!
Thanks! :)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
Y=mX+b [Where m=slope & b=the Y intercept.]
x-y=3
-y=-x+3
y=x-3 this line has a slope=1 & a Y intercept of -3. (red line)
x-2y=3
-2y=-x+3
y=-x/-2+3/-2
y=x/2-1.5 this line has a slope=1/2 & a Y intercept of -1.5 (green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+x+-3%2C+x%2F2+-1.5%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions x -3 and x/2 -1.5).
Solution (3,0)