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9 tháng 10 2017

Gọi số cần tìm la x: thuong cua x chia cho 26 la a thi x chia cho 24 duoc thuong la x+2.

Theo bài ra ta có: x:26=a dư 5  \(\Rightarrow\)x= 26a+5     (1)

                             x:24=a+2 du 5   \(\Rightarrow\)x= 24(a+2) + 5

     suy ra: 26a+5 = 24(a+2)+5

               \(\Rightarrow\)26a = 24a + 48

               \(\Rightarrow\)26a - 24a = 48

              \(\Rightarrow\)2a = 48

              \(\Rightarrow\)a = 48 : 24 = 2

  Thay a= 2 vao (1) ta duoc: x= 26*2 +5 = 57

  Vay so can tim la 57

24 tháng 10 2017

48 ở đâu vậy Đường Quỳnh Giang

2 tháng 3 2017

là 299

3 tháng 3 2017

thaks bạn nha !!!!

16 tháng 2 2016

Tui chỉ ấn 629 thui

co le la vay 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13 tháng 3 2016

Gọi n là thương của phép chia cho 26, ta được:

26 x n + 5 = 24 x (n+2) + 5 = 24 x n + 48 + 5

2 x n = 48

n = 48 : 2 = 24

Số cần tìm là:

26 x 24 + 5 = 629

Đáp số:629

Ai tích mình mình tích lại cho(đi mà)

dòng ý vói Le Nho khong nho

26 tháng 10 2016

4 là số dư lớn nhất trong phép chia cho 5

Gọi số cần tìm là a và b = a + 16

b chia hết cho 5 và thương tăng thêm 4

b chia hết cho 9 và thương tăng thêm 2

Lúc này 2 thương hơn kém nhau 26 + 2 = 28

9 x 5 = 45 nên 45 chia cho 9 bằng 5 và 45 chia cho 5 bằng 9

Số b là : 45 x 28 : (9 - 5) = 315

Số cần tìm là : 315 - 16 = 299

14 tháng 1 2017

299 la đúng đó chắc chắn 100% lun

12 tháng 11 2016

A : 8 dư 12

A : 12  dư 1

A : 8 = x dư 12

A : 12 = y dư 1

x * 8 + 12 = y * 12 + 1

x + 13 = y

( x + 13 ) * 8 + 12 = y * 12 + 1

x * 8 + 104 + 12 = y * 12 + 1

x * 12 - y x8 = 116 - 8

x * 4 = 108

x = 108 : 4

x = 27

Vậy số đó là :

27 * 8 + 5 = 221

Đáp số : 221

12 tháng 11 2016

bài này mình thi violympic trúng rồi 

kết quả bằng 221

23 tháng 1 2017

A : 8 dư 12

A : 12 dư 1

A : 8 = x dư 12

A : 12 = y dư 1 

x x 8 + 12 = y x 12 +1

x + 13 = y

( x + 13 ) x 8 +12 = y x 12 +1

x x 8 + 104 + 12 = y x 12 +1

x x 12 - y x 8 = 116 -8

x x 4 = 108

x = 108 : 4 

x = 27

Vậy số đó là 27 x 8 + 5 = 221

            Đáp số : 221

cho mình nha

23 tháng 1 2017

so do la 299 . k minh nha

14 tháng 6 2017

b=a+16

b chia het cho 9 va thuong tang them 2 don vi

b chia het cho 5 va thuong tang them bon don vi

hai thuong luc nay hon kem nhau:26+(4-2)=28

9*5=45 va 45 /9=5 va 45 /5 =9

vay so b la:45/(9-5)*28=315

so a can tim la:315-16=299

14 tháng 6 2017

Gọi a là số bị chia b là thương của phép chia a: 9 , c là thương của phép chia a: 5. ta biết số dư của phép tính a : 5 += 4

Ta có :

( b*5 +4 ) - ( c*9 +2) =0

( b*5 + 2) - ( c*9 ) = 0

26*5+2 - ( c*4) =0 ( vì c - b = 26 )

c*4 = 26 *5 +2 

c * 4 =132

c= 132 : 4 

c =33

Vậy số cần tìm là : 33*9+2= 299