Question 253673
A+C=345 OR A=345-C
5A+3C=1,395
5(345-C)+3C=1,395
1,725-5C+3C=1,395
-2C=1,395-1,725
-2C=-330
C=-330/-2
C=165 CHILDREN'S TICKETS WERE SOLD,
345-165=180 ADULT TICKETS SOLD.
PROOF:
5*180+3*165=1,395
900+495=1.395
1.395=1,395