-4 - x - 11 - 2x = 0

=>x = -5

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the h hinh lap phuong be bang so phan tram  the h phan tram hinh lap phuong lon la:

     3   : 4   bang 0,75  bang 75  phan tram 

                dap so :  75 phan tram 

a) ít nhất 1 giao điểm

b)nhiều nhất 2028098 giao điểm

Mình nghĩ vậy, ko biết có đúng hay không nữa

Thể tích của cái hộp dạng hình chữ nhật là :

      36 x 24 x 12 = 10368 ( cm³ )

Thể tích của mỗi hình lập phương như nhau cạnh 3 cm là :

       3 x 3 x 3 = 27 ( cm³ )

Cần số hình lập phương như thế để bỏ vào đầy hộp là :

     10368 : 27 = 384 ( hình lập phương )

            Đáp số : 384 hình lập phương

Gọi số cần tìm là A , ta có:

A + 1787 = A5

A + 1787 = A x 10 + 5

A + 1787 - 5 = A x 10 + 5 - 5

A + 1782 = A x 10

A + 1782 - A = A x 10 - A

A x 9 = 1782

A = 1782 : 9

A = 198

Vậy số cần tìm là 198 

Giả sử a tỉ lệ nghịch với b 

Thì a . b = k 

a₁ . b₁ = a₂ . b₂ = ........ = k