Solution

39461

Problem / game
Going to the cinema Back to problem
First name
Hoi Lam
School
Harrow International School Hong Kong
Country
Hong Kong
Age
13

X is adult, Y is pensioners, Z is children

3.5 X+ Y + 0.85 Z= 100\
-X-Y-Z= 100
2.5X - 0.15Z=0
2.5X= 0.15Z
X= 0.15 over 2.5
X= 15 over 250
X= 3 over 50
X= 3 Z= 50

3 adults is $10.5
50 children is $42.5

100-3-50= 47

47 pensioners is $47

$10.5 + $42.5 + $47= $53 + $47= $100

3 + 50 + 47 = 100