SOLUTION: Nina went to the mall traveling 6mph and returned home traveling 15mph. If the total trip took 7 hours, how long did Nina travel at each speed?

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Question 1109459: Nina went to the mall traveling 6mph and returned home traveling 15mph. If the total trip took 7 hours, how long did Nina travel at each speed?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
system%28x%2By=7%2C6x=15y%29

y=7-x
-
6x=15%287-x%29
2x=5%287-x%29
2x=35-5x
7x=35
x=5
-

5 hours at 6 mph
and
2 hours at 15 mph