Question 1091183
j, Jerbie now
m, Juan Mig now


---------------------------------------------------------------------------
Jerbie is two years older than Juan Mig. Three years from now Juan Mig's age would be half the age of Jerbie. The sum of their ages is 30.
--------------------------------------------------------------------------


{{{system(j=m+2,m+3=(j+3)/2,j+m=30)}}}


Description for the second equation probably wrong.  

Only enough description for two equations is necessary, for the two unknown ages.
If you could ignore the second equation's description, then you have  {{{system(j=m+2,j+m=30)}}}, and then you find  {{{system(m=14, j=16)}}}.