2x-y = 8
x-y = 5
edit: i just went to sleep after wrote this, corrections from others comment
2x-y=8
y-x=5
x is husband's, y is boku-kun's
1)
2x-y=8
x=(8-y)/2
2)
y-x=5
y-((8-y)/2)=5
y-4-0.5y=5
0.5y=9
y=18
3)
y-x=5
18-x=5
-x=5-18
-x=-13
x=13
boku-kun schlong is 18cm and husband is 13cm, do...