SOLUTION: Bernie left home, riding his bike at a rate of 15 miles per hour. Charlie left 1 hour later, biking at a rate of 20 miles per hour.How long will it take Charlie to catch up with Be

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Bernie left home, riding his bike at a rate of 15 miles per hour. Charlie left 1 hour later, biking at a rate of 20 miles per hour.How long will it take Charlie to catch up with Be      Log On

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Question 1159208: Bernie left home, riding his bike at a rate of 15 miles per hour. Charlie left 1 hour later, biking at a rate of 20 miles per hour.How long will it take Charlie to catch up with Bernie?
Answer by Amily_2190(27) About Me  (Show Source):
You can put this solution on YOUR website!
Let
X= number of hours Bernie rode his bike
X-1= number of hours Charlie rode his bike

15(x)=20(x-1)
15x=20x-20
-5x=-20
X=4
X-1=3
It will take Charlie 3 hours to catch up to Bernie.