<PRE><B>Question 273625</B>
The usual toll charge to use the Bingham tunnel is 50 cents. If you purchase a special sticker for $5.50, the toll is only 35 cents. At least how many trips through the tunnel are needed before the sticker costs less than paying for each trip separately?

0.50x = 5.50 + 0.35x
0.15x = 5.50
x = 36 2/3

about 37 trips

x	0.50x	5.50+0.35x
1	0.5	5.85
2	1	6.2
...
32	16	16.7
33	16.5	17.05
34	17	17.4
35	17.5	17.75
36	18	18.1
37	18.5	18.45
38	19	18.8
39	19.5	19.15
40	20	19.5
</PRE>