Find a number such that if 8 is subtracted from 9 times the number , the result is 6 more than twice the number

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

How do i do this activity, is appreciated

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?