SOLUTION: John and William leave their home traveling in opposite directions on a straight road. John drives 20 miles per hour faster than William> After 4 hours they are 250 miles apart. Fi

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Question 328124: John and William leave their home traveling in opposite directions on a straight road. John drives 20 miles per hour faster than William> After 4 hours they are 250 miles apart. Find their rates
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
250=(X+X+20)4
250=(2X+20)4
250=8X+80
8X=250-80
8X=170
X=170/8
X=21.25 MPH FOR THE SLOWER DRIVER.
21.25+20=41.25 MPH FOR THE FASTER DRIVER.
PROOF:
250=(21.25+41.25)4
250=62.50*4
250=250