Question

in the morning there were t people at the beach. later at noon, 2/7 of the people left the beach and there were 30 people left on the beach. find t

Answer 1

42

Explanation:

If 2/7 left that means that 5/7 are still there.

5/7x = 30 Multiple both sides by 7/5

x =
`(30)/(1)` x
`(7)/(5)`

x = 42