1st decorator : y = 50x + 75 2nd decorator : y = 60x + 50
when do they charge the same ? 50x + 75 = 60x + 50 75 - 50 = 60x - 50x 25 = 10x 25/10 = x 2 1/2 = x.....so they charge the same at 2 1/2 hrs or 2.5 hrs <==
If you look at the graph, you can see that at 5 packages, 2 stops have been made. Look at the image I have attached for additional help if you need it.