Respuesta :
Let x be kindergarten students
x = 420 - [(0.25*420) + (0.2*420)+115]
x= 420 - (105 + 84 + 115)
x= 420 - 304
x= 116 kindergarten students
x = 420 - [(0.25*420) + (0.2*420)+115]
x= 420 - (105 + 84 + 115)
x= 420 - 304
x= 116 kindergarten students