Carol H. answered 01/21/18
Tutor
4.9
(285)
Masters' Degree in Mathematics with 35 Years of Teaching Experience
Let x = the number of adult tickets sold
Let y = the number of child tickets sold
x + y = 144 y = 144 - x
9x + 6y = 1164
9x + 6(144 - x) = 1164
9x + 864 - 6x = 1164
3x = 300
x = 100
y = 144 - x = 144 - 100 = 44