Question 664295
The three people start with a total age of
{{{12 + 56 + 60 = 128}}} so some years down the road their total age will go above 150. How may years fro now is that?
Let's assume that that happens in x years.
At that time, the three people will be
{{12+x}}}, {{{56+x}}} and {{{60+x}}} years old
{{{12+x + 56+x + 60+x = 150}}}
{{{128 + 3x = 150}}}
{{{3x = 22}}} 
{{{x=7.333}}}
So in 7 years they will total to 149. in 7 years, they are 19, 63 and 67

At that point, whichever person has the earliest birthday will put them over the top (assumes that 2 or kmore of them are not born on the same day).
That makes three possible answers
(20, 63, 67) , (19,64,67) or (19,63,68)