SOLUTION: An Airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 mph. If the average airspeed for the entire flight was 350 mph, what equation can

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: An Airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 mph. If the average airspeed for the entire flight was 350 mph, what equation can      Log On


   

Question 738770: An Airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 mph. If the average airspeed for the entire flight was 350 mph, what equation can be used to find x?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
8x+7*325=15*350
x = 2975/8
x = 371.87 mph