Question 1200682
Maybe ambiguous, but a first try
Ron,  3c
Carl, c

{{{3c-5=12(c-5)-1}}}
{{{3c-5=12c-60-1}}}
{{{3c-5=12c-61}}}
{{{66=9c}}}
{{{c=66/9}}}
{{{c=22/3}}}
{{{c=7&1/3}}}---------MAYBE.
and then five years ago, Carl be {{{2&1/3}}}------MAYBE



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?
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Ron is 2 less than thrice the age of Carl. 5 years ago, Ron,...
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Ron, 3c-2
Carl, c

{{{3c-2-5=12(c-5)-1}}}, "twelve times Carl's age diminished by 1"


{{{3c-7=12c-60-1}}}

{{{-7=9c-61}}}

{{{9c=61-7}}}

{{{9c=54}}}

{{{c=6}}}