book Maths Puzzle Numerical Ability

A bus leaves a station at 1 P.M., traveling west at an average rate of 44mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart?

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Hello, I"m not sure if this is the right topic for this but how do you tell what property or like reflexive, substitution, transitive, and so on how can you tell what you use for e {{{bx^2+bx+a^2}}} where a and b are constants, and x is the unknown.