People pay to visit a stately home [tickets age 16 and over : £18.60 ... under 16:£12.80] 155 people pay and 49 of these people are under 16. How much money is collected

Answer: £2598.80

Step-by-step explanation:

Let those under 16 be x

Those over 16 be y

49 + y = 155

y = 155-49

y = 106 = over 16

for over 16, y * 18.60

= 106 * 18.60 = 1971.60

For under 16, x * 12.80

= 49 * 12.80 = 627.20