First step: Isolate the term that has x. To do that, subtract 2y from both sides.


Now divide both sides by 3.

16-4=12
12x5=60
I'm putting together assumptions as this isn't really clear to me, I apologize.
Answer:
4:10 and 6:15 are equivalent to 2:5
Answer:
36 minutes
Step-by-step explanation:
helicopter 1 is ahead of helicopter 2 by 90 miles
the difference in their speeds is 150 mph
90/150=3/5 of hour
3/5*60=36 minutes