There are two classes in grade five. Transfer 215 of class one to class two. At this time, 35 of class two is 34 of class one. How much of class one is the number of the whole grade?

There are two classes in grade five. Transfer 215 of class one to class two. At this time, 35 of class two is 34 of class one. How much of class one is the number of the whole grade?

The ratio of class two to class one is 34:35 = 5:4, 45 + 4 ^ (1-215), = 49 ^ 1315, = 2039; a: the original number of class one is 2039