Asked by big man on campus

A boy says "i have as many brothers as i do sisters." His sister says i have twice as many brothers as i do sisters." How many brothers and sisters are in the family?
Answered by stacey
the boy has 3 bros and 3 sisters
the girl has 4 bros and 2 sisters

theres 4 boys and 3 girls
Answered by Mike
b-1=s, 2(s-1)=b solve for s
2(s-1)=s+1
s=3
b-1=3
b=4