SOLUTION: two sisters are five and eleven respectively . the ratio of their years will be3:5 in how many years time

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Question 985528: two sisters are five and eleven respectively . the ratio of their years will be3:5 in how many years time
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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two sisters are five and eleven respectively .
the ratio of their years will be 3:5 in how many years time
:
let y = the number of years for this to be true
%28%28y%2B5%29%29%2F%28%28y%2B11%29%29 = 3%2F5
cross multiply
5(y+5) = 3(y+11)
5y + 25 = 3y + 33
5y - 3y = 33 - 25
2y = 8
y = 8/2
y = 4 yrs time they will be 9 and 15 respectively 9/15 = 3/5