Can someone tell me/ me solve these kinds of problems? i don’t understand them

This is called, I believe, power of points. To solve this, you multiply the two values on the same line together and that equals the product of the two values on the other line. So, for this problem:

24 * x = 12 * 17

Solve for x, and you get:

x = 17/2 = 8.5

step-by-step explanation:

one day the were 5 ducks, and their king told them to multiply their kingdom. so each went their own seperate way and met 4 other ducks on their journey.

when the ducks returned to their kingdom, it was discovered that there were 5 groups of 5 ducks. when the kind counted the number of ducks in total (including the ones he sent out earlier) he counted 25.

therefore 5 times 5 is 25.

the end. : )