SOLUTION: Mr. Moby is 2 times as old as his nephew. 25 years ago their ratio was 3:1. How old long until Moby is 100?

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Question 362697: Mr. Moby is 2 times as old as his nephew. 25 years ago their ratio was 3:1. How old long until Moby is 100?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let m = Mr Moby's age now
Let n = Nephew's age now
given:
(1) m+=+2n
(2) %28m+-+25%29%2F%28n+-+25%29+=+3%2F1
Substitute (1) in (2)
(2) %282n+-+25%29%2F%28n+-+25%29+=+3
2n+-+25+=+3n+-+75
n+=+50
m+=+2n
m+=+100
Moby is 100 now