Question 1093656
b, age of boy now
u, age of uncle now


The description formed into equations:
{{{system(b+5=(u+5)/2,b-6=(u-6)/3)}}}


After one or two steps:
{{{system(2b-u=-5,3b-u=12)}}}



{{{highlight(highlight(b=17))}}}-----The boy now
-
{{{highlight(u=39)}}}