Two planes just took off from Boston, MA. The first plane is traveling 3 times as fast as the second

Two planes just took off from Boston, MA. The first plane is traveling 3 times as fast as the second plane. After traveling in the same direction for 2 hours, they are 396 miles apart. What is the average speed of each plane? (Hint: Since they are traveling in the same direction, the distance between them will be the difference of their distances.)

2 part question
first part is the two equations
second part is the speeds of each plane

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