Two planes, which are 2520 miles apart, fly toward each other. Their speeds differ by 80 mph. If they pass each other in 4 hours, what is the speed of each?

Question

 i really need help with word problems and math in general I struggle

Answer 1

d=r*t

2520=r*4+(r+80)*4

2520=4r+4r+320

2520-320=8r

2200=8r

r=2200/8

r=275 mph

r+80=355 mph