Question 966721
B+G=57
B=2G-3
(2G-3)+G=57
3G-3=57
3G=57+3
3G=60
G=60/3
G=20 GIRLS.
B+20=57
B=57-20
B=37 BOYS.
PROOF:
37=2*20-3
37=40-3
37=37