Question 89413
A+S=264 OR S=264-A
6A+4.5S=1563.
NOW SUBSTITUTE (264-A) FOR S IN THIS EQUATION & SOLVE FOR A:
6A+4.5(264-A)=1563
6A+1188-4.5A=1563
1.5A=1563-1188
1.5A=375
A=375/1.5
A=250 NUMBER OF ADULT TICKETS SOLD.
264-250=14 NUMBER OF STUDENT TICKETS SOLD.
PROOF
6*250+4.5*14=1563
1500+63=1563
1563=1563