Question 167912
1.25X+.75(100-X)=85
1.25X+75-.75X=85
.5X=85-75
.5X=10
X=10/.5
X=20 ADULT TICKETS WERE SOLD.
PROOF:
1.25*20+.75(100-20)=85
25+.75*80=85
25+60=85
85=85