Question

Brett is a server at an all-you-can eat sushi restaurant. At one table, the customers ordered 3 child buffets and 1 adult buffet, which cost a total of $65. At another table, the customers ordered 3 child buffets and 3 adult buffets, paying a total of $111. How much does the buffet cost for each child and adult?

Answer 1

Answer:

child's is $14

adult is $23

Step-by-step explanation:

3c + 1a = 65

3c + 3a = 111

a = 65-3c

3c + 3(65-3c) = 111

3c + 195 -9c = 111

-6c = -84

c = 14

3(14) + a = 65

42 + a = 65

a = 23