5. Brown has his own bakery. He baked 5 cakes per day. Due to the occasion of Christmas, he started to bake 12 cakes per day. In the whole Christmas week how many cakes will he bake?

In a normal week, Brown bakes 5 cakes per day. Since there are 7 days in a week, he bakes a total of 5 * 7 = <<5*7=35>>35 cakes.

During the Christmas week, he will bake 12 cakes per day. Since there are also 7 days in the Christmas week, he will bake a total of 12 * 7 = <<12*7=84>>84 cakes.
Therefore, in the whole Christmas week, Brown will bake a total of 84 cakes. Answer: \boxed{84}.

what is the constance

Based on the given information, the number of cakes baked per day changed from 5 to 12 during Christmas week. However, there is no mention of any constant or constant value in the given question. If there is any specific constant that needs to be determined or mentioned in the question, please provide more details.

the constant is 5

Apologies for the confusion. If the constant number of cakes baked per day is 5, then we can calculate the total number of cakes baked during the Christmas week.

In a normal week, Brown bakes 5 cakes per day. Thus, in a normal week, he bakes a total of 5 * 7 = <<5*7=35>>35 cakes.

During the Christmas week, he increased his baking to 12 cakes per day. Since there are 7 days in the Christmas week, he bakes a total of 12 * 7 = <<12*7=84>>84 cakes.

Therefore, the total number of cakes Brown will bake during the Christmas week is 84.