Respuesta :
a=number of adult tickets
s=number of student tickets
a+s=250
4a+1s=427
elimination
multiply firs equation by -1 and add to 2nd
-a-s=-250
4a+s=427 +
3a+0s=177
3a=177
divide oth sides by 3
a=59
sub back
a+s=250
59+s=250
minus 59 both sides
s=191
191 students
s=number of student tickets
a+s=250
4a+1s=427
elimination
multiply firs equation by -1 and add to 2nd
-a-s=-250
4a+s=427 +
3a+0s=177
3a=177
divide oth sides by 3
a=59
sub back
a+s=250
59+s=250
minus 59 both sides
s=191
191 students