SOLUTION: Two people drove met and drove apart; one at 80 mph and the other at 70 mph. How many hours did it take for them to be 225 miles apart? (Could you please explain exactly how you so

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Question 893763: Two people drove met and drove apart; one at 80 mph and the other at 70 mph. How many hours did it take for them to be 225 miles apart? (Could you please explain exactly how you solve this problem.)
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming drove apart in opposite directions:

Let x = time in hours when they are 225 miles apart.

______________speed_______time______distance
FAST ONE______80__________x_________80x
SLOW ONE______70__________x_________70x
Total_________________________________225

80x%2B70x=225
%2880%2B70%29x=225
150x=225
x=225%2F150
highlight%28x=1.5%29