\(35-5\left(x-1\right)=10\\ \Leftrightarrow35-5x+5=10\\ \Rightarrow40-5x=10\)

\(\Rightarrow-5x=10-40\\ \Rightarrow-5x=-30\\ \Rightarrow x=\dfrac{-30}{-5}=6\)

c) 

\(24\left(x-16\right)=12^2\)

\(\Rightarrow24x-384=144\\ \Rightarrow24x=144+384\\ \Rightarrow24x=528\\ \Rightarrow x=\dfrac{528}{24}=22\)

d) 

\(\left(x^2-10\right)\div5=3\\ \Rightarrow\left(x^2-10\right)=3\times5\\ \Rightarrow x^2-10=15\)

\(\Rightarrow x^2=15+10\\ \Rightarrow x^2=25\\ \Rightarrow x^2=5^2\Rightarrow x=5\)

Ơ, bn ơi @Kenny sai sai ở đâu thì phải.

a, 3x X +122=21

\(3xX=21-122\)

\(3xX=-101\)

\(X=-101:3\)

\(X=-\frac{101}{3}\)

b,(36-X):2=10

\(36-X=10x2\)

\(36-X=20\)

\(X=36-20\)

\(X=16\)

c, 36-X:2 = 10

\(36-X:2=10\)

\(X:2=36-10\)

\(X:2=26\)

\(X=26x2\)

\(X=52\)

a.3xX+122=21

   3xX        =21-122

   3xX        =-101

       X       =-101:3

       X       =\(\frac{-101}{3}\)

x = 122 : 2 -2  + 10 

x =  69 

bn nha

122 : 2 - 2 + 10 = 69 

k cho mình với 

Ta co: X-10+2•2=122 

           X-10+4 =122

           X-14=122

                X=122+14

                X=136

Bài 1:

\(-15+\left(-122\right)=-137\)

\(\left(7-10\right)+3=-3+3\)

                              \(=0\)

\(\left|-127\right|-18.\left(5-6\right)=127-18.\left(-1\right)\)

                                                 \(=127-\left(-18\right)\)

                                                 \(=145\)

Bài 2:

\(\left|x+9\right|.2=10\)

\(\left|x+9\right|=5\)

\(\Rightarrow\orbr{\begin{cases}x+9=5\\x+9=-5\end{cases}\Rightarrow\orbr{\begin{cases}x=4\\x=-14\end{cases}}}\)

\(\Rightarrow x\in\left\{-14;4\right\}\)

Happy new year!!!

bài 1 :

a) ( - 15 ) + ( - 122 )

= -137

b) ( 7 - 10 ) + 3

= -3 + 3

= 0

c) |-127| - 18 . ( 5 - 6 )

= 127 - 18 . -1

= 127 - (-18)

= 145

Bài 2 :

| x + 9 | . 2 = 10

| x + 9 | = 10 : 2

| x + 9 | = 5

=> x + 9 = 5 hoặc x + 9 = -5

Nếu x + 9 = 5

x = 5 - 9

x = -4

Nếu x + 9 = -5

x = -5 - 9

x = - 14

Vậy x thuộc -4 và -14

Á nhầm =.=

Bài 2:

\(\left|x+9\right|.2=10\)

\(\left|x+9\right|=5\)

\(\Rightarrow\orbr{\begin{cases}x+9=5\\x+9=-5\end{cases}\Rightarrow\orbr{\begin{cases}x=-4\\x=-14\end{cases}}}\)

\(\Rightarrow x\in\left\{-14;-4\right\}\)

14884

122 x 122 = 14884.

Kết bạn nha

122 x 122 =14884 . nhé !!

122 x 122 = 14884

chuẩn

đăng cái này lên để làm gì, kiểm tra à

\(a)24\times(x-16)=12^2\\\Rightarrow 24\times(x-16)=144\\\Rightarrow x-16=144:24\\\Rightarrow x-16=6\\\Rightarrow x=6+16\\\Rightarrow x=22\\---\\b)(x^2-10):5=5\\\Rightarrow x^2-10=5\times5\\\Rightarrow x^2-10=25\\\Rightarrow x^2=25+10\\\Rightarrow x^2=35\\\Rightarrow x=\pm\sqrt{35}\\---\)

\(c)(5x+335):2=400\\\Rightarrow 5x+335=400\times2\\\Rightarrow 5x+335=800\\\Rightarrow 5x=800-335\\\Rightarrow 5x=465\\\Rightarrow x=465:5\\\Rightarrow x=93\\---\\d)63:(5x+4)=2^3-1\\\Rightarrow 63:(5x+4)=8-1\\\Rightarrow 63:(5x+4)=7\\\Rightarrow 5x+4=63:7\\\Rightarrow 5x+4=9\\\Rightarrow 5x=9-4\\\Rightarrow 5x=5\\\Rightarrow x=5:5\)

\(\Rightarrow x=1\)

\(Toru\)