exam Maths Puzzle Numerical Ability

a-2/a+3=3/5 solve for a

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exam Other Question

a train leaves the station at 6:00pm traveling west at 80 mi/h. on a parallel track, a second train leaves the station 3 hours later traveling west at 100mi/h. at what time will the second train catch up with the first? Computation review:

(-7) - (-5) =