Question 898641
Let {{{ n }}} = number of years from now
when father's age is twice son's age
---------------------------------
{{{ 38 + n = 2*( 12 + n ) }}}
{{{ 38 + n = 24 + 2n }}}
{{{ 2n - n = 38 - 24 }}}
{{{ n = 14 }}}
In 14 years father's age is twice son's age
check:
{{{ 38 + n = 2*( 12 + n ) }}}
{{{ 38 + 14 = 2*( 12 + 14 ) }}}
{{{ 52 = 2*26 }}}
{{{ 52 = 52 }}}
OK