John was n years old when his mother was 36 years old.

[fismn787]

John was n years old when his mother was 36 years old. Today, his mother is 3 times as old as John. Find John's age now in term of n.

 

[mmm4444bot]

John was n years old when his mother was 36 years old. Today, his mother is 3 times as old as John. Find John's age now in term of n.

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