SOLUTION: Ana is three times as old as Rain. Four years form now she will be twice as old as Rain. How old are they now?

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Question 555616: Ana is three times as old as Rain. Four years form now she will be twice as old as Rain. How old are they now?
Answer by TutorDelphia(193) About Me  (Show Source):
You can put this solution on YOUR website!
Anna is 3 times as old as Rain can be written as
a=3r
Anna's and Rain's ages in 4 years are a+4 and r+4. If we use that we get:
a+4=2(r+4)
to say "Four years form now she will be twice as old as Rain"
distribute
a+4=2r+8
Sub in 3r for a
3r+4=2r+8
subtract 2r from both sides
r+4=8
r=4
a=12