SOLUTION: IN 5 YEARS TIME, JOHN WILL BE 3 TIMES AS OLD AS HE WAS 9 YEARS AGO, HOW OLD IS HE NOW?

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Question 617551: IN 5 YEARS TIME, JOHN WILL BE 3 TIMES AS OLD AS HE WAS 9 YEARS AGO, HOW OLD IS HE NOW?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
No need to shout :)
Let x be his age now
Nine years ago he was x-9
Five years hence, he will be x%2B5
You are told
%28x%2B5%29+=+3%2A%28x-9%29
x%2B5+=+3x+-+27
32+=+2x
x+=+16
So check answer, is x+5 =(21) 3 times (x-9)=(7) ??