a/\(x\times5+122+236=633\)
\(x\times5=633-236-122\)
\(x\times5=275\)
\(x=275:5\)
\(x=55\)
b/\(\left(x:12\right)\times7+8=36\)
\(\left(x:12\right)\times7=36-8\)
\(\left(x:12\right)\times7=28\)
\(x:12=28:7\)
\(x:12=4\)
\(x=4\times12\)
\(x=48\)

cái ô vuông kia là dấu gì vậy bạn?

Dau nhan nha

x x 5 + 122 + 236 = 633

(x x 5 ) + 122 + 236 = 633

(x x 5 ) + 358           = 633

(x x 5 )                     = 633 -358

x x 5                         = 275

x                               = 275 : 5

x                              = 55

(x x 5 ) + 122 + 236 = 633

(x x 5 ) = 633 -358

x = 275 : 5

x = 55

\(x.5+122+236=633\)

              \(x.5+122=633-236\)

              \(x.5+122=397\)

                            \(x.5=397-122\)

                            \(x.5=275\)

                                \(x=275:5\)

                                \(x=55\)

k mình mình k lại

x.5=633-122-236

x.5=511-236

x.5=275

x=275/5

x=55

55 nhe ba

X x 5 + 122 + 236 = 663

X x 5                     = 663 -122 - 236

X x 5                     = 305

X                           = 305 : 5

X                           = 61

Học tốt nhé bạn ~

X x 5 + 122 + 236 = 663 X x 5                     

= 663 -122 - 236 X x 5         

         = 305 X                   

       = 305 : 5 X                       

   = 61

a. X x 5 + 112 = 633 - 236

X x 5 + 112 = 397

X x 5 = 397 - 112

X x 5 = 285

X = 285 : 5

X = 57

b. 3 x X = 620 - 320

3 x X = 300

X = 300 : 3

X = 100

c. (X + 3) : 6 = 7

X + 3 = 7 x 6

X + 3 = 42

X = 42 - 3

X = 39

a) \(15-5\left|x+4\right|=-12-3\)

\(\Leftrightarrow5\left|x+4\right|=30\)

\(\Leftrightarrow\left|x+4\right|=6\)

\(\Leftrightarrow\orbr{\begin{cases}x+4=6\\x+4=-6\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=2\\x=-10\end{cases}}\)

b) \(\left(4x-8\right)\left(7-x\right)=0\Leftrightarrow\orbr{\begin{cases}4x-8=0\\7-x=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=2\\x=7\end{cases}}\)

c) \(\left(x^2-36\right)\left(x^2+5\right)=0\Rightarrow\left(x-6\right)\left(x+6\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x-6=0\\x+6=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=6\\x=-6\end{cases}}\)

d) \(-3\left(x+7\right)-11=2\left(x+5\right)\)

\(\Leftrightarrow-3x-32=2x+10\)

\(\Leftrightarrow5x=-42\Rightarrow x=-\frac{42}{5}\)

Bài 1:

a: \(x=\dfrac{2}{3}:\dfrac{3}{5}=\dfrac{2}{3}\cdot\dfrac{5}{3}=\dfrac{10}{9}\)

b: \(x=\dfrac{17}{8}:\dfrac{7}{17}=\dfrac{17}{8}\cdot\dfrac{17}{7}=\dfrac{289}{56}\)

c: \(x=-\dfrac{3}{4}:\dfrac{7}{12}=\dfrac{-3}{4}\cdot\dfrac{12}{7}=\dfrac{-63}{28}=-\dfrac{9}{4}\)

d: \(\Leftrightarrow x\cdot\dfrac{1}{6}=\dfrac{3}{8}-\dfrac{1}{4}=\dfrac{1}{4}\)

hay \(x=\dfrac{1}{4}:\dfrac{1}{6}=\dfrac{3}{2}\)

e: \(\Leftrightarrow\dfrac{1}{2}:x=-4-\dfrac{1}{3}=-\dfrac{17}{3}\)

hay \(x=-\dfrac{1}{2}:\dfrac{17}{3}=\dfrac{-3}{34}\)

dad

`(5/6 -x+7/12) : ( 11/24 -1/8)=11/36`

`=>(5/6 -x+7/12) : (11/24 - 3/24)=11/36`

`=>(5/6 -x+7/12) : 8=11/36`

`=>5/6 -x+7/12=11/36 xx 8`

`=>5/6 -x+7/12=22/9`

`=> x+7/12=5/6-22/9`

`=> x+7/12=-29/18`

`=>x=-29/18 -7/12`

`=>x=-79/36`

79/36 nhé