a;=>3x=978

=>x=326

b: =>x=(2467-2):5=493

c: =>x=1479*7+3=10356

1479 x 1236 = 1828044

tk mk nha , tk bn rùi

1828044.

k đi

1479 x 1236 = 1828044

K mình thì mk k lại

\(\text{-7129+1478+7129+(-1479)}\)

\(=\text{-7129+7129+1478+(-1479)}\)

\(=0-1=-1\)

\(\text{|-5|.(-7)+4.(-9)}\)

\(=\text{5.(-7)+4.(-9)}\)

\(=\left(-35\right)+\left(-36\right)=-71\)

\(\text{(-4)²+35:(-7)}\)

\(=\text{16+(-5)=11}\)

( x : 142 ) + 457 = 625 

=> ( x : 142 ) = 625 - 457 = 168

=> x = 168/142 = 84/71 

x : 1/2 + x : 1/7 + x : 1/3 = 864 

=> x : ( 1/2 + 1/7 + 1/3 ) = 864 

=> x : 41/42 = 864 

=> x = 864 * 41/42 = 5904/7 

1+1+1=3

ta còn lại 3+24658943656765= 457+x

               24658943656768=457+x

=>   x=24658943656768-457

=>  x=24658943656311

a)=

b)>

c)=

Dễ mà !

1, 55 + 9 = 64

2, 2543 + 457 = 3000

3, x + 3 = 9

=> x = 9 - 3

=> x = 6

~Study well~

#ARMY_BLINK#

1, 55 + 9 = 64

2, 2543 + 457 = 3000

3, x + 3 = 9

    x       = 9 - 3

=> x=6

(x:42)+457=625

x:42=625-457

x:42=168

x=168.42

x=7056

Ta có : \(3x=1250+\dfrac{270}{\dfrac{3}{3}}=1250+\dfrac{270}{9}=1250+30=1280\)

\(\Rightarrow x=\dfrac{1280}{3}\)

Vậy ...

$-270 :3:3 + x .3 = 1250$

$\to -30 + 3x = 1250$

$\to 3x = 1280$

$\to x = \dfrac{1280}{3}$

Vậy : $ x = \dfrac{1280}{3}$

- 270 : 3 : 3 + X x 3 = 1250

- 270 : 9 + X x 3 = 1250

- 30 + X x 3 = 1250

X x 3 = 1280

X = \(\dfrac{1280}{3}\)