SOLUTION: Deandre left the library traveling 6 mph. Then, 4 hours later, Trent left traveling the same direction at 14 mph. How long until Trent catches up with Deandre?

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Question 1129138: Deandre left the library traveling 6 mph. Then, 4 hours later, Trent left traveling the same direction at 14 mph. How long until Trent catches up with Deandre?
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
             SPEED          TIME      DISTANCE

Deandre        6            x+4         d

Trent          14            x          d

6%28x%2B4%29=14x
-
3%28x%2B4%29=7x
3x%2B12=7x
12=4x
highlight%28x=3%29