6 kg of oil is obtained from 30 kg of sunflower seeds. How many kg of oil can you get from 25 kg of sunflower seeds?

To solve this problem, we need to make a proportion in which:
denote the required amount of oil as our unknown unknown x;
we equate this unknown x to 25 kilograms of sunflower seeds (according to the condition of the problem);
also, according to the condition, we equate 30 kilograms of sunflower seeds to 6 kilograms of oil.
Thus, based on the condition of the problem and all of the above, we get that our proportion will have the following form:
x = 25
6 = 30
Let us express our unknown x from this proportion and find its value
In order to express our unknown desired x from a given proportion, we need to use the rule of proportion or the rule of the cross. These rules state the following:
The product of the extreme terms of the proportion is equal, respectively, to the product of its middle terms.
Or in other words, we can say that if we draw a cross on our proportion, then the products of the members at the ends of this cross will be correspondingly equal.
Thus, we get that our proportion is converted into an expression that will look like this:
x * 30 = 25 * 6
Let us express our unknown unknown variable x from the resulting expression and get that it will take the following value:
x = 25 * 6/30 = 5 * 6/6 = 5 * 1 = 5
That is, based on the foregoing, we get that from 25 kg of sunflower seeds we can get 6 kg of oil.
Answer: 9 kg of butter.