a: \(\Leftrightarrow x:\dfrac{3}{10}=\dfrac{33}{8}:\dfrac{1}{5}=\dfrac{165}{8}\)

\(\Leftrightarrow x=\dfrac{165}{8}\cdot\dfrac{3}{10}=\dfrac{99}{16}\)

b: \(\Leftrightarrow x\cdot\dfrac{1}{100}:4=\dfrac{11}{15}\)

\(\Leftrightarrow x\cdot\dfrac{1}{100}=\dfrac{44}{15}\)

hay x=880/3

\(\left(152\frac{2}{4}-148\frac{3}{8}\right):0,2=x:0,3\)
      \(\left(\frac{305}{2}-\frac{1187}{8}\right):\frac{1}{5}=x:0,3\) 
                                     \(\frac{33}{8}.5=x:0,3\)
                                       \(\frac{165}{8}=x:0,3\)
                                       \(x:0,3=\frac{165}{8}\)
                                               \(x=\frac{99}{16}\)
Vậy \(x=\frac{99}{16}\)

a, ( 152 +và 2/4 - 148 và 3/8 ) : 0,2 = x : 0,3

=>  33/8 : 1/5 = x : 3/10

=>  x : 3/10 = 165/8

=>  x = 99/10

b, ( 85 và 7/30 - 83 và 5/18 ) : 2 và 2/3 = 0,01x : 4

=>  88/45 : 8/3 = 0,01x : 4

=> 0,01x : 4 = 11/15

=> 0,01x = 44/15

=> x = 880/3

c, x - 1/ x + 5 = 6/7

=> 7( x - 1 ) = 6( x + 5 )

=> 7x - 7 = 6x + 30

=> 7x - 6x = 7 + 30

=> x = 37

d, x²/6 = 24/25

=> x². 25 = 6 . 24

=> x².25 = 144

=> x² = 144/25

=> x = ( 12/5)² hoặc x = ( -12/5)

g, x - 3/ x + 5 = 5/7

=> 7( x - 3 ) = 5 ( x + 5 )
=> 7x - 21 = 5x + 25

=> 7x - 5x = 21 + 25

=> 2x = 46

=> x = 23

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

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

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

     \(\left(\frac{2}{5}-x\right):\frac{4}{3}=-\frac{9}{2}\)

        \(\frac{2}{5}-x=-\frac{9}{2}.\frac{4}{3}\)

        \(\frac{2}{5}-x=-3\)

                   \(x=\frac{2}{5}-\left(-3\right)\)

                   \(x=\frac{2}{5}+3\)

                   \(x=\frac{3}{5}-\frac{15}{5}\)

                   \(x=-\frac{12}{5}\)

Vay \(x=-\frac{12}{5}\) 

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

     \(\left(-3+\frac{3}{x}-\frac{1}{3}\right):\left(\frac{15}{15}+\frac{6}{15}+\frac{10}{15}\right)=-\frac{5}{4}\)

     \(\left(-3+\frac{3}{x}-\frac{1}{3}\right):\left(\frac{15+6+10}{15}\right)=-\frac{5}{4}\)

     \(\left(-3+\frac{3}{x}-\frac{1}{3}\right):\frac{31}{15}=-\frac{5}{4}\)

     \(\left(-3+\frac{3}{x}-\frac{1}{3}\right)=-\frac{5}{4}.\frac{31}{15}\)

     \(\left(-3+\frac{3}{x}-\frac{1}{3}\right)=-\frac{1}{4}.\frac{31}{3}\)

        \(-3+\frac{3}{x}-\frac{1}{3}=-\frac{31}{12}\)

        \(-3+\frac{3}{x}=-\frac{31}{12}+\frac{1}{2}\)

        \(-3+\frac{3}{x}=-\frac{31}{12}+\frac{6}{12}\)

        \(-3+\frac{3}{x}=\frac{-25}{12}\)

                     \(\frac{3}{x}=\frac{-25}{12}+3\)

                      \(\frac{3}{x}=\frac{-25}{12}+\frac{36}{12}\)

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

                      \(\frac{18}{6x}=\frac{5x}{6x}\)

Đèn dây , bạn tự làm tiếp nhé , de rồi chứ

c) \(\frac{0,375-0,3+\frac{3}{11}+\frac{3}{12}}{0,625-0,5+\frac{5}{11}+\frac{5}{12}}=\frac{3\left(0,125-0,1+\frac{1}{11}+\frac{1}{12}\right)}{5\left(0,123-0,1+\frac{1}{11}+\frac{1}{12}\right)}=\frac{3}{5}\)

a.211,0465116

Sai thôi nha

Phần trong ngăocj của G bạn lấy phần nguyên trừ phân nguyên và phần phân số trừ phần phân số thì ta được:

\(G=\left(153\frac{3}{4}-148\frac{3}{8}\right)\cdot0,3:0,2\)

\(=5\frac{3}{8}\cdot\frac{3}{10}:\frac{2}{10}=\frac{43}{8}\cdot\frac{3}{10}\cdot\frac{2}{10}\)

\(=\frac{43\cdot3\cdot2}{8\cdot10\cdot10}=\frac{43\cdot3\cdot2}{2\cdot4\cdot10\cdot10}=\frac{43\cdot3}{4\cdot10\cdot10}=\frac{129}{400}\)

Ta có:

\(G=\left(153\frac{3}{4}-148\frac{3}{8}\right).0,3:0,2\)

\(G=\left(153\frac{6}{8}-148\frac{3}{8}\right).0,3:0,2\)

\(G=\left[\left(153-148\right)+\left(\frac{6}{8}-\frac{3}{8}\right)\right].\frac{3}{2}\)

\(G=5\frac{3}{8}.\frac{3}{2}\)

\(G=\frac{43}{8}.\frac{3}{2}\)

\(G=\frac{129}{16}\)

t mik nha

a)

\(\Rightarrow\left(\frac{305}{2}-\frac{1187}{8}\right):\frac{1}{5}=x:\frac{3}{10}\)

\(\Rightarrow\frac{33}{8}.5=x:\frac{3}{10}\)

\(\Rightarrow x=\frac{33}{8}.5.\frac{3}{10}\)

\(\Rightarrow x=\frac{99}{16}\)