a) x : 11 = 25

x = 25 x 11

x = 275

b) x : 11 = 78

x = 78 x 11

x = 858

\(11\times\left(x-6\right)=4\times x+11\)

\(\Rightarrow11\times x-66=4\times x+11\)

\(\Rightarrow11\times x-4\times x=66+11\)

\(\Rightarrow77\times x=77\)

\(\Rightarrow x=1\)

b) \(\left(2\times x-10\right)\times\left(25-25\times x\right)=0\)

\(\Rightarrow\orbr{\begin{cases}2\times x-10=0\\25-25\times x=0\end{cases}\Rightarrow\orbr{\begin{cases}x=5\\x=1\end{cases}}}\)

a)11x(X-6)=4xX+11

   11xX-11x6=4xX+11

    11xX-4xX=11x6+11

    (11-4)xX=66+11

      7xX=77

       x=77:7

       x=11

b)(2xX-10)x(25-25xX)=0

=>2xX-10=0=>2xX=10 =>x=10:2=5

hoặc 25-25xX=0=>25xX=25=>x=25:25=1

Vậy x=1 hoặc x=5

Tích ch0 mình nha

Cảm ơn bạn nhìu

a)11x(X-6)=4xX+11

   11xX-11x6=4xX+11

    11xX-4xX=11x6+11

    (11-4)xX=66+11

      7xX=77

       x=77:7

       x=11

b)(2xX-10)x(25-25xX)=0

=>2xX-10=0=>2xX=10 =>x=10:2=5

hoặc 25-25xX=0=>25xX=25=>x=25:25=1

Vậy x=1 hoặc x=5

11 – (15 + 11) = x – (25 – 9)

11 -15 -11 = x – 16

-15 = x – 16

-15 + 16 = x

X = 1

\(11-\left(15+11-2.x\right)=x-\left(25-9\right)\)

\(11-15-11+2x=x-16\)

\(2x-x=-16-11+15+11\)

\(1x=-1\)

\(x=-1\)

a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )

11-15-11=x-25+9

-15=x-16

x=1

b, 2 - x = 17 - ( - 5 )

2-x=22

x=-20

c, x - 12 = ( - 9 ) - 15

x-12=-24

x=-12

d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )

(7-x)-32=-16

7-x=16

x=-9

#H

11 - ( 15 + 11 ) = x - ( 25 - 9 )

             11 - 26 = x - 16

                  - 15 = x - 16

          - 15 + 16 = x

                      1 = x. 

Nhớ tick mình nhé !

=> x - 16 = 15

=> x = 15 + 16

x = 31

11-(15+11)=x-(25-9)
11-26       =x-(25-9)
-15           =x-(25-9)
-15           =x-16
 16+(-15)   =x
      1         =x

`9/25-11/25:x=1/5`

`=>11/25:x=9/25-1/5`

`=>11/25:x=9/25-5/25`

`=>11/25:x=4/25`

`=>x=11/25:4/25`

`=>x=11/25xx25/4`

`=>x=11/4`

Lời giải:
$25-(x+11)=x-16$

$25=x-16+x+11=2x-5$

$2x=25+5=30$

$x=30:2=15$