s=number of students
a=number of adults
cost=costadult+costkids
cost=4a+2s
cost=360
360=4a+2s
total tickets is 105
105=s+a
so we got
our equations are
4a+2s=360 and
a+s=105
so wto solve
multiply 2nd equation by -2 and add to first
4a+2s=360
-2a-2s=-210 +
2a+0s=150
2a=150
divide by 2
a=75
sub back
s+a=105
s+75=105
minus 75 both sides
s=30
30 student tickets and 75 adult tickets
equation 1: 4a+2s=360
equation 2: a+s=105