b) x:17+83=297

=> x:17=297-83

=>x:17=214

=>x=214x17

=>x=3638

tíc mình nha

a) 135 - (x + 32) = 80

                x + 32  = 135 - 80

                x + 32  = 55

                x           = 55 - 32

                x           = 22.

c) 9052:x-56=17

=> 9025:x=17+56

=> 9025:x=73

=> x= 9025:73

=>x=\(\frac{9025}{73}\)

tíc mình nha

Nhiều thế ko biết làm à e

X-358=4768

tự làm

D

D

D

a: =>1/x=4

hay x=1/4

b: =>x+7=-10

=>x=-17

c: =>x²=36

=>x=6 hoặc x=-6

d: =>(x-3)²=16

=>x-3=4 hoặc x-3=-4

=>x=7 hoặc x=-1

\(a,\dfrac{1}{-x}=-4\\ \Rightarrow\left(-x\right)\left(-4\right)=1\\ \Rightarrow4x=1\\ \Rightarrow x=\dfrac{1}{4}\\ b,\dfrac{x+7}{15}=\dfrac{-24}{36}\\ \Rightarrow\dfrac{x+7}{15}=\dfrac{-2}{3}\\ \Rightarrow3\left(x+7\right)=-2.15\\ \Rightarrow3x+21=-30\\ \Rightarrow3x=-51\\ \Rightarrow x=-17\)

\(c,\dfrac{x}{-3}=\dfrac{-12}{x}\\ \Rightarrow x.x=\left(-3\right)\left(-12\right)\\ \Rightarrow x^2=36\\ \Rightarrow x=\pm6\)

\(d,\dfrac{-2}{x-3}=\dfrac{x-3}{-8}\\ \Rightarrow\left(x-3\right)\left(x-3\right)=\left(-2\right)\left(-8\right)\\ \Rightarrow\left(x-3\right)^2=16\\ \Rightarrow\left[{}\begin{matrix}x-3=4\\x-3=-4\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=7\\x=-1\end{matrix}\right.\)

a.\(\Leftrightarrow4x=1\Leftrightarrow x=\dfrac{1}{4}\)

b.\(\Leftrightarrow\left(x+7\right).36=-360\Leftrightarrow x+7=-10\Rightarrow x=-17\)

c.\(x^2=36\Leftrightarrow x=6;-6\)

d.\(-2.-8=\left(x-3\right)\left(x-3\right)\Leftrightarrow16=x^2-6x+9\Leftrightarrow x^2-6x-7=0\Rightarrow x=7;-1\)

a) x/12 = -1/24 - 1/8

    x/12 = -1/6

    x/12 = 2/12

        x  = 2 X 12 : 12 

  Vậy x = 2

b) 2/3 . x - 1/2 .x = 5/4

          x.(2/3-1/2) = 5/4

          x.1/6       = 5/4

          x             = 5/4 :1/6

    Vậy x            = 15/2

a, x = -2

b, x = 15/2

mình đã trình bày rõ ràng rồi, k cho mình đi.

b, 30(x+20) - 6(x-5) - 24 - x =100

30x+600-6x+30-24-x=100

30x-6x+x=100-600-30-24

25x=-554

x=\(-\frac{554}{25}\)

cho li-ke nha

a, -12 . (x-5)+ 7 . ( 3-x ) =15

-12x+60+21-7x=15

-12x7x=15-60-21

-21x=-66

x=  -544/25

tick nha 

a)\(x+678=7818\)
\(x=7818-678=7140\)
b)\(4029+x=7684\)
\(x=7684-4029=3655\)
c)\(x-1358=4768\)
\(x=4768+1358=6126\)

\(a,x+678=7818\)

\(x=7818-678\)

\(x=7140\)

\(b,4029+x=7684\)

\(x=7684-4029\)

\(x=3655\)

\(c,x-1358=4768\)

\(x=4768+1358\)

\(x=6126\)