Answer:
Adult tickets = 15
Children tickets = 9
Step-by-step explanation:
x = adult tickets
y = children tickets
8x + 4y = 156
x + y =24
Therefore,
x = 24 - y
y = 24 - x
Substitute,
8 (24 - y) + 4y = 156
192 - 8y + 4y = 156
-8y + 4y = 156 - 192
-4y = -36
y = 9
Therefore,
x + 9 = 24
x = 24 - 9
x = 15
Check your answers
8x + 4y = 156
8(15) + 4(9) = 156
120 + 36 = 156
156 = 156