Question

Как решить задачу ученик купил тетради в клетку в три раза больше чем тетради в линейку причём их была на 18 больше чем тетради в линейку сколько всего тетради купил ученик

Answer 1

Пусть х*3 тетради в клетку
тогда х тетради в линейку
составляем уравнение: х*3-х = 18
3х-х=18
2х=18
х=9 - тетрадей в линейку
9*3= 27 тетрадей в клетку
ответ : в линейку было 9 тетрадей, в клетку 27

Answer 2

Бирем тетради в линейку за 1 часть 
тогда тетрадей в клетку было 3 *1 =3 части 
1) 3-1 =2 части ( на 2 части тетрадей в клетку было больше, чем в линейку ) 
2) 18 :2 =9 тетрадей приходится на одну часть 
3) 3+1 =4 части составляют все тетради 
4) 9*4 =36 всего куплено тетрадей 
или другим способом 
3) 9*1 =9 тетрадей в линейку 
4) 9*3 =27 тетрадей в клетку 
5) 9+27 =36 всего тетрадей

Answer 3

Problem Analysis

To solve this problem, we need to determine the total number of notebooks the student bought. We are given that the student bought three times as many grid notebooks as line notebooks, and there were 18 more grid notebooks than line notebooks.

Solution

Let's assume the number of line notebooks the student bought is x.

According to the problem, the student bought three times as many grid notebooks as line notebooks. Therefore, the number of grid notebooks the student bought is 3x.

We are also given that there were 18 more grid notebooks than line notebooks. So, we can set up the following equation:

3x = x + 18

To solve this equation, we can subtract x from both sides:

3x - x = x + 18 - x

Simplifying the equation, we get:

2x = 18

Now, we can solve for x by dividing both sides of the equation by 2:

x = 18 / 2

Simplifying further, we find:

x = 9

Therefore, the student bought 9 line notebooks.

To find the total number of notebooks the student bought, we can substitute the value of x back into the equation:

3x = 3 * 9 = 27

Therefore, the student bought a total of 27 notebooks.

Answer

The student bought a total of 27 notebooks.