Question 757170
let samuel's  brother is x yrs
then samuel is 2x/3 yrs
after 5 yrs samuel will be 2x/3+5 & his brother will be x+5
he will be 3/4 as old as his brother will be
so 2x/3+5=3(x+5)/4
or 8x+60=9x+45 multiplying 12 both sides
or x=15
so samuel's  brother is 15 yrs & samuel 2*15/3=10 yrs