\(\dfrac{x}{8}=-\dfrac{1}{4}\)

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

\(x:2=-1\)

\(x=-1.2\)

\(x=-2\)

\(\dfrac{1^{10}}{8}:^{\dfrac{ }{ }^{ }}\)\(\dfrac{1^4}{16}=\dfrac{1}{8}:\dfrac{1}{16}=\dfrac{1}{8}.\)\(16=1.2=2\)

Số thứ nhất:

\(700:\left(4+1\right).4=560\)

Số thứ hai:

\(700-560=140\)

Vậy....

Tham Khảo!!!

\(3.A=\left(\dfrac{x-4}{\sqrt{x-2}}+\dfrac{x-2\sqrt{x}}{\sqrt{x}}\right):\sqrt{x}\)

\(=\left(\dfrac{\sqrt{x-2}.\sqrt{x+2}}{\sqrt{x-2}}+\dfrac{\sqrt{x}\left(\sqrt{x-2}\right)}{\sqrt{ }}x\right).\dfrac{1}{\sqrt{x}}\)

\(=\left(\sqrt{x}+2+\sqrt{x}-2\right).\dfrac{1}{\sqrt{x}}\)

\(=2\sqrt{x}.\dfrac{1}{\sqrt{x}}\)

\(=2\)

nếu mấy câu kia bn ko làm đc thì bn phải ghi "....." chứ