SOLUTION: ~ Two automobiles start out from two points kilometers apart and travel toward each other. The automobile from the east travels at 10 kph faster than the automobile from the west.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: ~ Two automobiles start out from two points kilometers apart and travel toward each other. The automobile from the east travels at 10 kph faster than the automobile from the west.       Log On


   

Question 551350: ~ Two automobiles start out from two points kilometers apart and travel toward each other. The automobile from the east travels at 10 kph faster than the automobile from the west. If they meet after 5 hours, what is the average speed of each automobile?
~One man is five times as old as his brother. Fifteen years later, he will be twice as old. How old are the two men now?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Problem 1 how man km apart
brother's age =x
man's age = 5x
after 15 years
brother's age = x+15
Man's age = 5x+15
5x+15= 2(x+15)
5x+15=2x+30
5x-2x=15
3x=15
x=5 brother's age
Man's age = 5x = 5*5 = 25 years
HAPPY NEW YEAR