Question

Дедушка положил на тарелку 17 конфет.После того,как каждый внук взял с тарелки по 2 конфеты,на ней осталось 9 конфет.Сколько у дедушки внуков?

Answer 1

17-9=8 (конфет взяли)
8:2=4 (внука)
Ответ: у дедушки 4 внука

Answer 2

Problem Analysis

We are given that the grandfather put 17 candies on a plate, and after each grandchild took 2 candies, there were 9 candies left on the plate. We need to determine the number of grandchildren the grandfather has.

Solution

Let's assume that the grandfather has x grandchildren.

If each grandchild took 2 candies, then the total number of candies taken by the grandchildren would be 2x.

Since there were 9 candies left on the plate after the grandchildren took their share, we can set up the following equation:

17 - 2x = 9

To solve for x, we can subtract 9 from both sides of the equation:

17 - 9 - 2x = 9 - 9

This simplifies to:

8 - 2x = 0

Next, we can subtract 8 from both sides of the equation:

8 - 8 - 2x = 0 - 8

This simplifies to:

-2x = -8

Finally, we can divide both sides of the equation by -2 to solve for x:

-2x / -2 = -8 / -2

This simplifies to:

x = 4

Therefore, the grandfather has 4 grandchildren.

Answer

The grandfather has 4 grandchildren.