SOLUTION: Can you please find the intersection of the lines y= -2x and y= x-3. please graph!!!

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Can you please find the intersection of the lines y= -2x and y= x-3. please graph!!!      Log On


   

Question 638872: Can you please find the intersection of the lines y= -2x and y= x-3. please graph!!!
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(1) +y+=+-2x+
(2) +y+=+x+-+3+
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If I substitute (1) into (2),
(2) +-2x+=+x+-+3+
(2) +-3x+=+-3+
(2) +3x+=+3+
(2) +x+=+1+
Plug this result back into (1)
(1) +y+=+-2%2A1+
(1) +y+=+-2+
So, the intersection should be at (1,-2)
Here's the plot:
+graph%28+400%2C+400%2C+-6%2C+6%2C+-6%2C+6%2C+-2x%2C+x-3+%29+