The pie chart shows the sports played by 30 boys. How many boys play Rugby?

Which of the following expressions are equivalent ?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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.