SOLUTION: A train left Phoenix and traveled east. Five hours later, another train left Phoenix traveling at 45 kilometers per hour, trying to catch up with the first train. After four hours,

SOLUTION: A train left Phoenix and traveled east. Five hours later, another train left Phoenix traveling at 45 kilometers per hour, trying to catch up with the first train. After four hours,

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Question 918958: A train left Phoenix and traveled east. Five hours later, another train left Phoenix traveling at 45 kilometers per hour, trying to catch up with the first train. After four hours, the second train caught up with the first train. How fast was the first train travelling?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
9x=45*4
x=20 mph for the first train
check
5*20+4*20=4*45
100+80=180
180=180
ok

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