After 4 new students joined a class, the class has 30 students. Which equation can be used to find n, the number of students in the class before the new students joined?

30-4= 26

Step-by-step explanation:

if the number of students is 30 after 4 new students join then subtract 4 from 30 and you will get your answer

the distance between point a and point b is 6 units

its 4 because 2 times 2 is 4, if you double the number two you get four