Question

Answer 1

`x/2+(x+x)/3+(x+x+x)/4`

`=x/2+(2x)/3+(3x)/4`

`=(6x)/12+(8x)/12+(9x)/12`

`=(23x)/12`

Answer 2

giúp mik với nahnh nhé mik cần gấp 

xin các bạn đó 

Answer 3

Ta có: \(\dfrac{x}{2}+\dfrac{x+x}{3}+\dfrac{x+x+x}{4}=5\dfrac{3}{4}\)

\(\Leftrightarrow\dfrac{1}{2}x+\dfrac{2}{3}x+\dfrac{3}{4}x=\dfrac{23}{4}\)

\(\Leftrightarrow\dfrac{23}{12}x=\dfrac{23}{4}\)

hay x=3

Vậy: x=3