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Question

Twenty years ago,  my age was 1/3 of what it is now.  What is my age

 


Solution

20 years ago my age was 1/3 of what it is now
:
Let a = age now
a/3 = a - 20
multiply both sides by 3
a = 3(a-20)
a = 3a - 60
60 = 3a - a
60 = 2a
a = 30 yrs now 

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