The store brought 430 kg of buckwheat groats, there were 30 packages of 9 kg in each package, and 20 identical

The store brought 430 kg of buckwheat groats, there were 30 packages of 9 kg in each package, and 20 identical packages of rice. How many kilograms of rice were in each bag.

Buckwheat was – 30 packages * 9 kg = 180 (kg) -built,
subtract the mass of buckwheat from the bulk – 430 kg -180 kg = 250 kg,
to find out the mass of each package of rice, you need 250 kg: 20 packages = 12.5 (kg) – rice in each package.
Answer: 12.5 kg