SOLUTION: A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took 3 hours less time. Find the speed going.

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Question 122725This question is from textbook Prentice Hall Algebra 1
: A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took 3 hours less time. Find the speed going. This question is from textbook Prentice Hall Algebra 1

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
120/X+120/2X=3
(2*120+120)/2X=3 NOW CROSS MULTIPLY
6X=240+120
6X=360
X=360/6
X=60 MPH IS THE SPEED GOING.
60*2=120 MPH FOR THE RETURN TRIP.
PROOF.
120/60+120/120=3
2+1=3
3=3