(2314-(346+2x))+124=2036

2314-(346+2x)           =2036-124

2314-(346+2x)           =1912

          346+2x             =2314-1912

          346+2x             =402

                  2x             =402-346

                  2x             =56

                    x             =56:2

                    x             =28

11: Ta có: \(\left(x+3\right)^3=125\)

\(\Leftrightarrow x+3=5\)

hay x=2

12: Ta có: \(\left(2x\right)^4=16\)

\(\Leftrightarrow x^4=1\)

hay \(x\in\left\{1;-1\right\}\)

11: Ta có: \left(x+3\right)^3=125(x+3)3=125

$\iff x+3=5$

hay x=2

12: Ta có: \left(2x\right)^4=16(2x)4=16

\Leftrightarrow x^4=1(2x)   = 2   =2  4

           4      

⇔2x=2⇔ x=1

13) 32:(3x-2)=2^3

32:(3x-2)=8

3x-2=32:8=4

3x=4+2=6

x=6:3=2

⇔x=2

1290<2345

2314>45

124=124

250-50=200

234+34=268

4:4=1

1290<2345

2314>45 

124=124

Tính: 250-50=200

234+34=268

4:4=1

1.

1290 < 2345

2314 > 45

124 = 124

2.

250 - 50 = 200

234 + 34 = 268

4 : 4 = 1

\(a,\left|2x-5\right|=1\)

\(\Rightarrow\orbr{\begin{cases}2x-5=1\\2x-5=-1\end{cases}\Rightarrow\orbr{\begin{cases}2x=6\\2x=4\end{cases}\Rightarrow}\orbr{\begin{cases}x=3\\x=2\end{cases}}}\)

b, đề thiếu 

À ý b, thiếu : [124-920-4x)]:30+7=11 như này là đề đúng

bn sửa hình như sai sai 

\(\left[124-\left(20-4x\right)\right]:30+7=11\)

\(\left[124-20+4x\right]:30=4\)

\(124-20+4x=120\)

\(104+4x=120\)

\(4x=16\)

\(x=4\)

a) 4x+6=3x-4

<=>4x-3x=-4-6

<=>x=-10

a)Tìm x:

4x+6=3x-4

4x-3x=-4-6

       x=-10

Vậy x=-10

c)Tính nhanh:

2315.(-2314+1)-2314.(1-2315)

=2315.(-2314)+2315-2314-2314.2315

=2315.(-2314+1-2314)-2314

=2315.(-4627)-2314

=-10711505-2314

=-10713819

a, 4x + 6 = 3x - 4

=> 4x - 3x = - 4 - 6

=> 1x = -10

=> x = - 10

Vậy x = - 10

b, Vì IbI > 0 nên để IbI - b = 0 thì b cũng phải lón hơn 0

Vậy b > 0

c, 2315 . (-2314 +1 ) - 2314 . ( 1- 2315)

= 2315 . (- 2314) + 2315 . 1 - 2314 . 1 - 2314 . 2315

= 2315 . (- 2314 + 1 + 2314) - 2314 . 1

= 2315 . 1 -2314 . 1

= 1. ( 2315 - 2314)

=1. 1

=1

B1: 

a, 25-x=15 

x=25-15  =10

b,9+2.x=3^7 : 3^4

9+2.x = 3^3

2.x=27-9

2.x=18

x=18:2=9

2:

a: 15x-9x+2x=72

=>17x-9x=72

=>8x=72

=>x=9

b:Sửa đề: 96-7*(x+1)=12^4:12^3

=>96-7(x+1)=12

=>7*(x+1)=84

=>x+1=12

=>x=11

c: 2^x*4=128

=>2^x=32

=>x=5

1:

c: 41-(2x-5)=18

=>2x-5=41-18=23

=>2x=28

=>x=13

d: \(2^{x-2}=11\)

mà x nguyên

nên \(x\in\varnothing\)

\(\frac{x-1}{42}+\frac{2x-1}{83}+\frac{3x-1}{124}=-3\)

\(< =>\frac{10292.\left(x-1\right)}{432264}+\frac{5208.\left(2x-1\right)}{432264}+\frac{3486.\left(3x-1\right)}{432264}=\frac{-3.432264}{432264}\)

\(< =>10292.\left(x-1\right)+5208.\left(2x-1\right)+3486.\left(3x-1\right)=-1296792\)

\(< =>10292x-10292+10416x-5208+10458x-3486=-1296792\)

\(< =>\left(10292+10416+10458\right)x=-1296792+3486+5208+10292\)

\(< =>31166x=-1277806\)

\(< =>x=\frac{-1277806}{31166}\)

\(< =>x=-41\)

\(\Leftrightarrow\frac{5146x-5146+5208x-2604+5229x-1743}{216132}=-3\)

\(\Leftrightarrow\frac{15583x-9493}{216132}=-3\)

\(\Leftrightarrow15583x=-638903\)

\(\Leftrightarrow x=-41\)

Cách nhanh hơn  bạn:v

\(\frac{x-1}{42}+\frac{2x-1}{83}+\frac{3x-1}{124}=-3\)

\(\Rightarrow\frac{x-1}{42}+1+\frac{2x-1}{83}+1+\frac{3x-1}{124}+1=0\)

\(\Rightarrow\frac{x+41}{42}+\frac{2x+82}{83}+\frac{3x+123}{124}=0\)

\(\Rightarrow\frac{x+41}{42}+\frac{2\left(x+41\right)}{83}+\frac{3\left(x+41\right)}{124}=0\)

\(\Rightarrow\left(x+41\right)\left(\frac{1}{42}+\frac{2}{83}+\frac{3}{124}\right)=0\Leftrightarrow x=-41\)

 x + 32 = 23 + 24.

 x + 32 = 47

 x         = 47 - 32.

 x         = 15.

 x  + 123 = 2314 + 1234

 x + 123  = 3548.

 x           = 3425.

mình trả lời đầu tiên mà bạn

x + 32 = 23 + 24.

 x + 32 = 47

 x         = 47 - 32.

 x         = 15.

 x  + 123 = 2314 + 1234

 x + 123  = 3548.

 x           = 3425 ****