a) x = 100.           

b) x = 28.            

c) x = 0.               

d) x = 0.

Bài cô t vừa giao nè

274 - ( 9x+18)=4

9x+18=274-4

9x+18=270

9x=270-18

9x=252

x=252:9

x=28

442+(418-x)=860

418-x=860-442

418-x=418 

x=418-418

x=0

`274 - ( 9xx x+18)=4`

`9xx x+18 =274-4`

`9xx x+18 =270`

`9 xx x=270-18`

`9 xx x=252`

`x=252:9`

`x= 28`

__

`442+(418-x)=860`

`418-x=860-442`

`418-x=418`

`x=418-418`

`x=0`

`#3107`

`274 - (9x + 18) = 4`

`=> 9x + 18 = 274 - 4`

`=> 9x + 18 = 270`

`=> 9x = 270 - 18`

`=> 9x = 252`

`=> x = 252 \div 9`

`=> x = 28`

Vậy, `x = 28.`

____

`442 + (418 - x) = 860`

`=> 418 - x = 860 - 442`

`=> 418 - x = 418`

`=> x = 418 - 418`

`=> x = 0`

Vậy, `x = 0.`

a) (x - 32) = 68

x = 68 + 32

x = 100

b)9 .x+18=274-4

9.x+18=270

9x=270-18

9x=252

x=252:9

x=28

c) 418 - x = 860 - 442

418 - x = 418

x = 0

d) b xem lại câu hỏi nhé

 T.I.C.K GIÚP MK NHÉ!

A> => x=0+68+32

=>x=100

b> =>x=442+418-860=> x=0

c> => 9x=274-4-18

=>9x=252

=> x=28

$a)(x-25)-175=0$

$\to x-25=0+175=175$

$\to x=175+25$

$\to x=200$

$b)485-(6.x+60)=5$

$\to 6.x+60=485-5=480$

$\to 6.x=480-60=420$

$\to x=420:6=70$

c) ( x - 31 ) - 68 = 0

x - 31 - 68 = 0

x - 99 = 0

x - 99 +99 = 0 + 99

x = 0 + 99

x = 99

Hơi dài nên mình ko làm 

a) 35.(x-10)=35

         x-10= 35:35

         x-10= 1

             x= 1+10

            x= 10

b) 21.(32-x) =21

          32-x = 21:21

          32-x = 1

               x= 32-1

                x= 31

a)\(35.\left(x-10\right)=35\Rightarrow x-10=35:35=1\Rightarrow x=10+1=11\)

b) \(21.\left(32-x\right)=21\Rightarrow32-x=21:21=1\Rightarrow x=32-1=31\)

c) \(25.\left(2x.4\right).12=0\Rightarrow25.\left(2x.4\right)=0:12=0\Rightarrow2x.4=0:25=0\)

\(\Rightarrow2x=0:4=0\Rightarrow x=0:2=0\)

720 ban

chuc ban hoc tot nhe!

a)102,418,720,860

b)102,135,369,720,975

c)135,720,860,975

d)135,369,720

e)720,860

g)720

              hok tot!

a) chia hết cho 2 : 102;418;720;860

b) chia hết cho 3 : 102;135;369;720;975

c) chia hết cho 5 : 135;720;860;975

d) chia hết cho 9: 135;369;720

e) chia hết cho cả 2 và 5 : 720

g) chia hết cho cả 2 ,3 , 5 và 9

a.\(x:308=509\)
\(x=509x308=156772\)
b.\(x+354=860-45\)
\(x+354=815\)
\(x=415-354=61\)

a, x = 509 x 308 = 156772

b, x + 354 = 815

x = 815 - 354 = 461

a) X : 308 = 509

           X=509x 308

           X=156772

  b) X + 354 = 860 – 45

     X + 345 = 815

             X= 815-345 

             X=461

a)\(x=875-\left(50\times7\right)=875-350=525\)

b)\(x=504:14=36\)

a,525

b,36

c,69

d,14620

c)\(x=5760:96=60\)

d)\(x=860\times17=14620\)