5/6 : x + 1/2 : 1/6 = 6 .

5/6 : x +  3 =  6 .

5/6 : x = 6 - 3 .

5/6 : x = 3 .

x = 5/6 : 3 .

x = 5/18 .

Vậy x = 5/18 .

`5/6 : x + 1/2 : 1/6=6`

`5/6 : x + 3=6`

`5/6 :x= 3`

`x=5/6 : 3`

`x=5/18`

\(\dfrac{5}{6}:x+\dfrac{1}{2}:\dfrac{1}{6}=6\)

\(\dfrac{5}{6x}+3=6\)

\(\dfrac{5}{6x}=3\)

\(6x.3=5\)

\(18x=5=>x=\dfrac{5}{18}\)

b) \(B=\dfrac{\sqrt{10}\left(\sqrt{2}-\sqrt{5}\right)}{\sqrt{2}-\sqrt{5}}+\dfrac{6\left(2+\sqrt{10}\right)}{4-10}+\sqrt{\left(3\sqrt{7}+2\right)^2}\)

\(=\sqrt{10}-2-\sqrt{10}+3\sqrt{7}+2=3\sqrt{7}\)

a: k=3/4

b: y=3/4x

Cửa hàng đã bán:

420 x 25% = 105(kg)

Lượng gạo cửa hàng còn lại sau bán:

420 - 105= 315 (kg)

đk : x khác -1 ; 1 

\(\Rightarrow x+1+2x-2=x^2-1\Leftrightarrow3x-1=x^2-1\Leftrightarrow x^2-3x=0\Leftrightarrow x=0;x=3\)

(tm)

giúp j :v 

đou cj

?

going

has

some

the

very

here