How can i subtract fractions using arrow way example 3 3/6-5/6

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

John read the first 114 pages of a novel, which was 3 pages less than 1/3 of the novel. write an equation to determine the total number of pages (p)(p) in the novel.

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?