SOLUTION: I have to graph the following two equations on the same graph y=.05x+60 and y=.15x+40. I need help solving these equations.

Algebra ->  Graphs -> SOLUTION: I have to graph the following two equations on the same graph y=.05x+60 and y=.15x+40. I need help solving these equations.      Log On


   

Question 470006: I have to graph the following two equations on the same graph y=.05x+60 and y=.15x+40. I need help solving these equations.
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
+graph%28+200%2C+200%2C+-100%2C+300%2C+-100%2C+300%2C+0.05x%2B60%2C+0.15x%2B40%29+
Solution is where they cross
y=.05x+60 multiply this one by -3 and add to second one
y=.15x+40
*********
-3y=-0.15x-180
y=.15x+40 add them
****************
-2y=-140 divide each side by -2
y=70 now plug this into one of the original equations
70=.05x+60
10=.05x divide each side by .05
200=x
so the solution is (200,70)