PLS HELP ASAP Camelia buys a cake for 24.99 she also buys 12 brownies. each brownie cost the same amount. she spends 39.99 on the cake and the brownie.

Camellia finds the cause of each Bonnie by calculating (39.99 - 24.99) ÷ 12. Tanya finds the cause of each brownie by solving the equation 39.99 + 12b equal 24.99, where B is the cost of each brand
which approach uses the sequence of operations necessary to find the cost of each brownie: camellia's, tanya's, both or neither? ​