Solve showing work

14 = 3x + 4
i don't understand this

Can someone me out here number 4 plz

: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?

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.