book Maths Puzzle Numerical Ability

Please Help... Two trains left a station traveling in opposite directions at the same rate. One train traveled 372 miles in 1.5 hours more than it took the other train to travel 27

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I am trying to make sure my answer is correct.

-(-2+4x)-(3-4x)+5=-(-3+6x)+x+1
My answer is 0=x If you invest $7,500 in an account paying 8.35% compounded continuously, how much money will be in the account at the end of
(A) 5.5 years?
(B) 12 years?

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