Question

22 children were at a birthday party. Each girl drank 2 glasses of fruit punch and each boy drank
3 glasses of fruit punch. If the boys drank 31 more glasses of fruit punch, how many girls attended
the party?

Answer 1

Let x girls be there and y boys be there
So x+y=22
x=22-y
3y-2x=31
3y-2(22-y)=31
3y-44+2y=31
5y=75
Y=15and x=7
So 7 girls attended the party