SOLUTION: Two trains leave the station at the same time, but headed in opposite directions. The first train travels 10mph faster than the second train. After six hours they are 720 miles apa

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Question 861393: Two trains leave the station at the same time, but headed in opposite directions. The first train travels 10mph faster than the second train. After six hours they are 720 miles apart. What are the speeds of the trains.
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
LET X BE THE SPEED OF THE SLOWER TRAIN
LET X+10 BE THE SPEED OF THE FASTER TRAIN
720=(X+X+10)6
720=(2X+10)6
720=12X+60
12X=720-60
12X=660
X=660/12
X=55 MPH FOR THE SLOWER TRAIN.
55+10=65 MPH FOR THE FASTER TRAIN.
PROOF:
720=(55+65)6
720=120*6
720=720