93876:x=180(dư 459)

x=(93876-459):180

x=519

tick nha

x bằng 519 nha bạn

Ta có : 93879 : x = 180 dư 459 

   hay  93879 = 180 x x + 459

=>180 x x = 93879 -459=93420

=> x = 938420 : 180 = 519

Vậy x = 519

     93879 : x = 180 ( dư 459 )

=>( 93879 - 459 ) : x = 180

=>       93420      : x = 180

=>                        x = 93420 : 180

=>                        x = 519

\(a,35\times x-9251=7269\\ 35\times x=7269+9251\\ 35\times x=16520\\ x=16520:35\\ x=472\)

\(b,2352:x=1792:32\\ \\ 2352:x=56\\ x=2352:56\\ x=42\)

\(c,x:204=112\left(dư.22\right)\\ x=204\times112+22\\ x=22848+22\\ x=22870\)

\(d,93879:x=108\left(dư.459\right)\\ x=\left(93879-459\right):108\\ x=93420:108\\ x=865\)

\(a,35\times x-9251=7269\)

  \(35\times x=7269+9251\)

 \(35\times x=16520\)

 \(x=16520\div35\)

 \(x=472\)

Bạn bị thiếu phải ko

\(\dfrac{180}{x-4}-\dfrac{180}{x}=\dfrac{1}{2}\)

\(\Leftrightarrow\) \(\dfrac{2x\cdot180}{2x\left(x-4\right)}-\dfrac{2\cdot180\cdot\left(x-4\right)}{2x\left(x-4\right)}=0\)

\(\Leftrightarrow\) \(\dfrac{360x-360x+1440-x^2+4x}{2x\left(x-4\right)}=0\)

\(\Leftrightarrow\) \(\dfrac{-x^2+4x+1440}{2x\left(x-4\right)}=0\)

\(\Leftrightarrow-x^2+4x+1440=0\)

\(\Leftrightarrow-x^2+40x-36x+1440=0\)

\(\Leftrightarrow-x\cdot\left(x-40\right)\cdot\left(-36\right)\cdot\left(x-40\right)=0\)

\(\Leftrightarrow\left(x-40\right)\cdot\left(x-36\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-40=0\\x+36=0\end{matrix}\right.\)

 \(x-40=0\)

  \(x=0+40\)

 \(x=40\)

\(x+36=0\)

   \(x=0-36\)

   \(x=-36\)

\(\Leftrightarrow\left[{}\begin{matrix}x=40\\x=-36\end{matrix}\right.\)

\(180\left(\dfrac{1}{x-4}-\dfrac{1}{x}\right)=\dfrac{1}{2}\)

\(\dfrac{1}{x-4}-\dfrac{1}{x}=\dfrac{1}{360}\left(đk:x\ne0,4\right)\)

\(\dfrac{x-x+4}{x\left(x-4\right)}=\dfrac{1}{360}\)

\(\dfrac{4}{x\left(x-4\right)}=\dfrac{1}{360}\)

\(x^2-4x=1440\)

\(x^2-4x+4=1444\)

\(\left(x-2\right)^2=1444=38^2\)

\(\Leftrightarrow\left[{}\begin{matrix}x-2=38\\x-2=-38\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=40\\x=-36\end{matrix}\right.\)

`180 xx (180 :10)`

`= 180 xx 18`

`= 3240`

`---`

`180 xx (180:10)`

`= (180 xx 180) :10`

`= 32400 : 10`

`=3240`

=>9x+4y=360 và 36/x-36/y=1/2

=>4y=360-9x và 36/x-36/y=1/2

=>y=90-2,25x và \(\dfrac{36}{x}-\dfrac{36}{90-2,25x}=\dfrac{1}{2}\)

=>\(\dfrac{3240-81x-36x}{x\left(90-2,25x\right)}=\dfrac{1}{2}\)

=>90x-2,25x^2=2(3240-117x)

=>-2,25x^2+90x-6840+234x=0

=>x=118,3 hoặc x=25,7

=>y=-176,175 hoặc y=32,175