Question 682828
7x + 2y = 92 ⇒ where x is adults and y is children
y = x - 8
7x + 2(x-8) = 92 ⇒ substituting y = x-8
7x + 2x - 16 = 92
9x = 92 + 16
9x = 108
x = 12 as cost for adult’s ticket
y = 12-8= 4 as cost for child’s ticket