Gỉai `x` `5,12-64x +38,4x =3,84`

`@` Người Dùng Ẩn Danh Bổ Sung.

Giải $x$

${5 , 12 − 64 x + 38 , 4 x = 3 , 84}$

`⇔128/25− 64 x + 38 , 4 x = 3 , 84 `

`⇔128/25− 64 x + `$\dfrac{192x}{5}=3,84$

`⇔128/25+`$\dfrac{-64x}{1}+$ $\dfrac{192x}{5}=3,84$

`⇔128/25+` $\dfrac{− 320 x + 192 x}{5 }=3,84$

`⇔128/25+`$\dfrac{-128x}{5}=3,84$

$⇔\dfrac{128}{25}-$ $\dfrac{128x}{5}=3,84$

$⇔\dfrac{128}{25}-$ $\dfrac{128x}{5}=$ $\dfrac{96}{25}$

$⇔\dfrac{128}{25}-(128x)=$ $\dfrac{96}{5}$

$⇔128x=\dfrac{32}{5}$

$⇔x=\dfrac{1}{20}$

Vậy, `x=1/20`