I need help with a math question. (Sorry if it looks like that)

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?

8.74 rounded to the nearest whole number