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.

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) (Show Source): You can put this solution on YOUR website!

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)

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