SOLUTION: Define two variables. Write two equations and then solve. Two airplanes travel toward each other from cities that are 780 km apart at speeds of 190 km/h and 200 km/h. They left a

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Define two variables. Write two equations and then solve. Two airplanes travel toward each other from cities that are 780 km apart at speeds of 190 km/h and 200 km/h. They left a      Log On


   

Question 1066365: Define two variables. Write two equations and then solve.
Two airplanes travel toward each other from cities that are 780 km apart at speeds of 190 km/h and 200 km/h. They left at the same time. In how many hours will they meet?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x, the time until they "meet".

%28190%2B200%29x=780

x=780%2F390=78%2F39=highlight%282%29