6more than a number k is less than or equal to 12

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.