Question

В ТРЕХ КНИЖНЫХ ШКАФАХ 545КНИГ.В ПЕРВОМ ШКАФУ КНИГ В 5 РАЗ БОЛЬШЕ,ЧЕМ ВО ВТОРОМ,А В ТРЕТЬЕМ 143КНИГИ.CКОЛЬКО КНИГ В ПЕРВОМ ШКАФУ?

Answer 1

1)545-143=402 (книг) в первом и втором шкафу 

2)402:6=67(кн)-в первом шкафу

3)402-67=335(кн)-во втором шкафу

Answer 2

1)545-143=402(книг)-в первом и втором шкафу вместе.

 пусть х книг- во втором ,тогда 5х книг в первом.

х+5х=402

6х=402

х=67 книг-во втором.

2)67*5=335 книг в перовм шкафу. 

Answer 3

Calculation of the Number of Books in the First Bookcase

To find out how many books are in the first bookcase, we need to use the information given in the question. Let's break down the information step by step:

- The total number of books in the three bookcases is 545. - The number of books in the first bookcase is 5 times more than the number of books in the second bookcase. - The number of books in the third bookcase is 143.

Let's assign variables to represent the number of books in each bookcase:

- Let's call the number of books in the first bookcase "x." - The number of books in the second bookcase will be "y." - The number of books in the third bookcase is given as 143.

Based on the given information, we can set up the following equations:

1. The total number of books in the three bookcases is 545: - x + y + 143 = 545

2. The number of books in the first bookcase is 5 times more than the number of books in the second bookcase: - x = 5y

Now, we can solve these equations to find the number of books in the first bookcase.

Substituting the value of x from equation 2 into equation 1, we have:

5y + y + 143 = 545 6y + 143 = 545 6y = 545 - 143 6y = 402 y = 402 / 6 y = 67

Now that we know the value of y, we can substitute it back into equation 2 to find the value of x:

x = 5y x = 5 * 67 x = 335

Therefore, there are 335 books in the first bookcase.