SOLUTION: how to solve 3x-y=9 and 7x+2y=1

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: how to solve 3x-y=9 and 7x+2y=1      Log On


   

Question 343556: how to solve 3x-y=9 and 7x+2y=1
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
3x-y=9
-y=-3x+9
y=3x-9 (red line)
7x+2y=1
2y=-7x+1
y=-7x/2+1/2
y=-3.5x+.5 (green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+3x+-9%2C+-3.5x+%2B.5%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 3x +9 and -3/5x +.5).
Ans.(1.31,-5.07)