Question 89429
A+C=23 A=23-C
4A+1C=80 NOW SUBSTITUTE (23-C) FOR A & SOLVE FOR C
4(23-C)+1C=80
92-4C+1C=80
-3C=80-92
-3C=-12
C=-12/-3
C=4 NUMBER OF CHILDREN TICKETS.
23-4=19 ADULT TICKETS.
PROOF
4*19+4*1=80
76+4=80
80=80