Question 551350
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