Question 298677
y/x+y/2x=1
2y+y=2x
3y=2x
y=2x/3

y/5+y/10=1
2y+y=10
3y=10
y=10/3
it takes them 10/3 (3 1/3 )days together if x=5
so they complete 3/10 in one day
so they complete 3x/2 in one day