* \(20+65.4=\left(x+75\right):5+30\)

\(\Leftrightarrow20+260-30=\frac{x}{5}+\frac{75}{5}\)

\(\Leftrightarrow20+260-30-\frac{75}{5}=\frac{x}{5}\)

\(\Leftrightarrow235=\frac{x}{5}\Rightarrow x=235.5=1175\)

* \(2248:\left[119-\left(x-6\right)\right]=24\)

\(\Leftrightarrow2248:\left(119-x+6\right)=24\)

\(\Leftrightarrow2248:\left(125-x\right)=24\)

A mình lỡ tay, để mình tính tiếp nhá!

\(\Leftrightarrow125-x=2248:24\Leftrightarrow125-x=\frac{281}{3}\Rightarrow-x=\frac{94}{3}\Rightarrow x=-\frac{94}{3}\)(bài này mình thấy sai sai sao á, nếu mình làm sai thì thông cảm cho mình nhé!

* \(\left(x+70\right):14-40=\left(32.15\right):2\)

\(\Leftrightarrow\left(x+70\right):14=480:2+40\)

\(\Leftrightarrow\frac{x}{14}+5=280\Leftrightarrow\frac{x}{14}=275\Rightarrow x=3850\)

* \(x-4867=\left(175.2050.70\right):25+23\)

\(\Leftrightarrow x-4867-23=\left(175:25\right).\left(2050:25\right).\left(70:25\right)\)

\(\Leftrightarrow x-4890=7.82.\frac{14}{5}\)

\(\Leftrightarrow x-4890=\frac{8036}{5}\Rightarrow x=\frac{8036}{5}+4890=\frac{32486}{5}\)(bài này mình thấy hình như cũng có cái gì đó sai sai luôn hihi!)

=24 nha

2448:[119-[x-6]]=24

<=> 199 - ( x-6 ) = 2448 : 24 = 102

<=> x - 6 = 199 - 102 = 97

<=> x = 97 +6 = 103

2448:[119-(x-6)]=24

119-(x-6)= 2448 : 24

119-(x-6)= 102

x-6= 119-102

x-6= 17

x=17+6

x=23

2448:[119-[x-6]]=24

        [119-(x-6)]=2448:24

        [119-(x-6)=102

                 x-6=119-102

                 x-6=17

                    x=17+6

                    x=23

119 - (x - 6) = 2448 : 24=102

x-6= 119 - 102=17

x = 17 + 6=23

119 - ( x - 6 ) = 2448 : 24 = 102

x - 6 = 119 - 102 = 17

x = 17 + 6 = 23

k cho minh nha NGUYEN LINH DAN ! cam on ban

2448 : [ 119 - ( x - 6 ) ] = 24

119 - ( x - 6 ) = 102

x - 6 = 17

x = 23

\(2448:\left[119-\left(x-6\right)\right]=24\)

\(119-\left(x-6\right)=2448:24\)

\(119-x+6=102\)

\(125-x=102\)

\(x=125-102\)

\(x=23\)

\(2448:\left[119-\left(x-6\right)\right]=24\)

\(\Rightarrow119-\left(x-6\right)=2448:24\)

\(\Rightarrow119-\left(x-6\right)=102\)

\(\Rightarrow x-6=119-102\)

\(\Rightarrow x-6=17\)

\(\Rightarrow x=17+6\)

\(\Rightarrow x=23\)

Học tốt # 

a) 8,2x + 1,8x = 0,3

x(8,2 + 1,8) = 0,3

10x = 0,3

x = 0,3 : 10

x = 0,03

b) 2448 : [119 - (x - 6)] = 24

119 - (x - 6) = 2448 : 24

119 - (x - 6) = 102

x - 6 = 119 - 102

x - 6 = 17

x = 17 + 6

x = 23

a, 8,2.x+1,8.x = 0,3 

x.(8,2+1,8) = 0,3

x.10          = 0,3

x              = 0,3:10

x              = 3/100

b, 2448 : [119-(x-6)] = 24

 119-(x-6)                = 2448:24

119-(x-6)                 = 102

x-6                          = 119-102

x-6                          = 17

x                            = 17+6

x                            =23                            

a, x=23

b, x=54

a, = 23 

b, = 54

nha bạn

trả lời đầy đủ hơn được ạ

a)

=>9x+1=937=>9x=936=>x=104

b)

=>199-(x-6)=24.2448=>-(x-6)=58752-199=>-x+6=58553=>-x=58547=>x=-58547

12 tập hợp

\(2448:\left[119-\left(x-6\right)\right]=24\)

\(119-\left(x-6\right)=2448:24\)

\(119-\left(x-6\right)=102\)

\(x-6=119-102\)

\(x-6=17\)

\(x=17+6\)

\(x=23\)( thỏa mãn \(x\in N\) )

vậy x = 23

\(2016-100\cdot\left(x+11\right)=2^7:2^3\)

\(2016-100\cdot\left(x+11\right)=128:8\)

\(2016-100\cdot\left(x+11\right)=16\)

\(100\cdot\left(x+11\right)=2016-16\)

\(100\cdot\left(x+11\right)=2000\)

\(x+11=2000:100\)

\(x+11=20\)

\(x=20-11\)

\(x=9\)( thỏa mãn \(x\in N\))

vậy x = 9

1) 2448 : [ 119 - (x - 6)] = 24

=> 119 - (x - 6) = 2448 : 24

=> 119 - x + 6 = 102

=> 125 - x = 102

=> x = 125 - 102 = 23 (thỏa mãn x thuộc N)

Vậy x = 23

2) 2016 - 100.(x + 11) = 2^7 : 2^3 

=> 2016 - 100.(x + 11) = 2^4 = 16

=> 100.(x+11) = 2016 - 16 = 2000

=> x + 11 = 2000 : 100 = 20

=> x = 20 -11 = 9 ( thỏa mãn)

Vậy x =9