6-b=5b+30 how do I solve this

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?