<PRE><B>Question 992043</B>
.
A=number of adults; S=number of students
.
A+S=45
S=45-A
.
$7S+$11A=$335
$7(45-A)+$11A=$335
$315-$7A+$11A=$335
$4A=$20
A=5
.
S=45-A=45-5=40
.
ANSWER: There were 40 students and 5 adults,
with at most 2 teachers,and at least 3 parents.
.
CHECK:
$7S+$11A=$335
$7(40)+$11(5)=$335
$280+$55=$335
$335=$335</PRE>