x - 3456 - 456 = 56

x - 3456 = 56 + 456

x - 3456 = 512

x = 512 + 3456

x = 3968

qq

hhgjj

`x xx 12=456 xx 16`

`x xx 12=7296`

`x=7296:12`

`x=608`

`-------`

`x : (23xx6)=9`

`x :138=9`

`x=9 xx 138`

`x=1242`

a)

`X xx 12 = 456 xx 16`

` X xx 12 = 7296`

`X = 7296:12`

`X=608`

b)

`x:(23xx6)=9`

`x:138=9`

`x=9xx138`

`x=1242`

( 123 . 456 - 23 . 16 ) . ( 12 . 9 - 4 . 27)

= ( 56088 - 368) . ( 108 - 108 )

= 55720 . 0

= 0

( 123 x 456 - 23 x 16 ) x ( 12 x 9 -4 x 27 )

=( 123 x 456 - 23 x 16 ) x (108 -108)

=( 123 x 456 - 23 x 16 ) x 0=0

1) 20,22 : 0,5 + 20,22 : 0,125

= 20,22 x 2 + 20,22 x 8

= 20,22 x (2 + 8)

= 20,22 x 10

= 202,2

2) 3456 x 37 + 3456 x 19 + 3456 x 45 - 3456

= 3456 x 37 + 3456 x 19 + 3456 x 45 - 3456 x 1

= 3456 x (37 + 19 + 45 - 1)

= 3456 x 100

= 345600

(123x456-23x46)x(12x9-4x27)

=.......x.....

=0

( 123 * 456 - 23 * 46) * (12 * 9 - 4 * 27) = 55030 * 0

                                                        = 0.

456:2*18 + 456:3 - 102

= 228 * 18 + 152 - 102

= 4104 + 152 - 102

= 4104+ 50

= 4154

1482:x + 23= 80

1482: x = 80- 23

1482 : x= 57

x= 1482: 57

x= 26 

học tốt!

456 :2 *18 +456:3 _102    

=228x18+(456:3)-102

=4164+152-102

=4154

1482 :x +23 =80

=1482:x=80-23

=>1482:x=57

=>x=1482:57

=>x=26

chúc bạn hok tốt
 

 x + ( 123 + 456 ) - ( 23 + 56 ) = 789 

x+579-79=789

x+579=789+79=     1568

x=1568-579=989

nhớ kick cho ình nha

Tìm x  :  

x + ( 123 + 456 ) - ( 23 + 56 ) = 789 

x + 579 - 79 = 789 

x + 579 = 789 + 79 = 868

x = 868 - 579 

x = 289