Ta có:  7200 : [ 200 + ( 33600 : x ) - 500 ] = 4

                        [ 200 + ( 33600 : x ) - 500 ] = 1800

                        200 + ( 33600 : x ) = 2300

                        33600 : x = 2100

                         x = 16

 7200 : [ 200 + ( 33600  : x ) - 500 ] = 4

            [ 200 + ( 33600  : x ) - 500 ] = 7200 : 4

            [ 200 + ( 33600  : x ) - 500 ] = 1800

             ( 33600  : x ) - 500              = 1800 - 200

             ( 33600  : x ) - 500              = 1600

                33600  : x                         = 1600 + 500

                33600 : x                          = 2100

                             x                          = 33600 : 2100

                             x                          = 16

hok tốt

9²¹<729⁷¹

phai giai nua ban a

a, 51 + ( 432 - 4x ) : 3 = 191

\(\Rightarrow\) (432 - 4x ) : 3 = 140

\(\Rightarrow\) 432 - 4x = 420

\(\Rightarrow\) 4x = 12

\(\Rightarrow\) x=3

51 + ( 432 - 4x ) : 3 = 191

        ( 432 - 4x ) : 3 = 191 - 51

        ( 432 - 4x ) : 3 = 140

          432 - 4x        = 140 x 3

          432 - 4x        =  420

                    4x       = 420 - 417

                    4x       = 3 

                      x       = 3 : 4

                      x       = \(\frac{3}{4}\)

             Vậy   x  = \(\frac{3}{4}\)

=132

k mick nhé

cac ban giup minh lam voi dem nay minh phai di hoc

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

Ta gọi số cần tìm là a

Ta có:a:15 dư 2 ---> a-2 chia hết(dấu) cho 15

        a:32 dư 2----> a-2 chia hết cho 32

       a:75 dư 2----->a-2 chia hết cho 75

Suy ra a thuộc BC{15,32,75}

Ta có: 15 = 3.5

           32=2⁵.1

           75=3.5²

BCNN(15,32,75)=3.2⁵.5²=1200

Suy ra a-5 thuộc B(1200)

Suy ra a-5 thuộc(1200 , 2400, 3600,4800,...)

Suy ra a thuộc(1202,2402,3602,4802,...)

Do a nhỏ nhất nên a =1202

Vậy số đó là:1202

\(\frac{21^2.14.125}{35^3.6}\)

\(=\frac{7^2.3^2.2.7.5^3}{7^3.5^3.2.3}\)

\(=\frac{7^3.3^2.2.5^3}{7^3.5^3.2.3}\)

\(=3\)

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

1 đề xi mét khối

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

abcd=2097

Nhớ k cho mình!!

=a.1000+b.100+c.10+d-(a+b+c+d)

=a.999+a+b.99+b+c+9+c+d-(a+b+c+d)

=a.999+b.99+c.9

mà 999;99;9 đều chia hết 9 nên abcd-(a+b+c+d) chia hết 9