Question

[Hoang Tuyet Nhi]

Giúp với ạ

Answer 1

[Lê Văn Trung (тεam ASL)]

Bạn ơi làm cái này hơi lâu đấy

Bạn giảm bớt đc ko

Answer 2

[๒ạςђ ภђเêภ♕]

b)\(5\frac{4}{7}:x=13\)

\(\Leftrightarrow x=\frac{3}{7}\)

c)\(7x-3x=3,2\)

\(\Leftrightarrow4x=3,2\)

\(\Leftrightarrow x=0,8\)

d)\(2\frac{2}{3}.x+8\frac{2}{3}=3\frac{1}{3}\)

\(\Leftrightarrow\frac{8}{3}x=-\frac{16}{3}\)

\(\Leftrightarrow x=-2\)

e)\(3\frac{2}{7}x-\frac{1}{8}=2\frac{3}{4}\)

\(\Leftrightarrow\frac{23}{7}x=\frac{23}{8}\)

\(\Leftrightarrow x=\frac{7}{8}\)

i)\(2\frac{1}{4}\left(x-7\frac{1}{3}\right)=1,5\)

\(\Leftrightarrow x-\frac{22}{3}=\frac{2}{3}\)

\(\Leftrightarrow x=8\)

k)\(\left(1-\frac{3}{10}-x\right):\left(\frac{19}{10}-1-\frac{2}{5}\right)+\frac{4}{5}=1\)

\(\Leftrightarrow\left(\frac{7}{10}-x\right):\frac{1}{2}=\frac{1}{5}\)

\(\Leftrightarrow\frac{7}{10}-x=\frac{1}{10}\)

\(\Leftrightarrow x=\frac{3}{5}\)

m)\(\left(2,8x-32\right):\frac{2}{3}=-90\)

\(\Leftrightarrow2,8x-32=-60\)

\(\Leftrightarrow2,8x=-28\)

\(\Leftrightarrow x=-10\)

n)\(\left(4,5-2x\right).1\frac{4}{7}=\frac{11}{14}\)

\(\Leftrightarrow4,5-2x=\frac{1}{2}\)

\(\Leftrightarrow-2x=-4\)

\(\Leftrightarrow x=2\)

#H