two trains that are 495 mi apart travel towards each other T

two trains that are 495 mi apart travel towards each other. They pass each other 5 hrs later. If one trains is traveling half as fast as the other, what are their speed?
5x+5y=495
x=1/2-y
5(1/2-y)+5y=495

You have a two step problem.
r=D/t
r=495/5
r=99 mph total speed coming together
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2x+x=99
3x=99
x=33 mph
2x=66 mph