Lời giải:

a. $x(\frac{4}{5}x-1)(0,1x-10)=0$

$\Rightarrow x=0$ hoặc $\frac{4}{5}x-1=0$ hoặc $0,1x-10=0$

Nếu $\frac{4}{5}x-1=0$

$\Rightarrow x=1: \frac{4}{5}=\frac{5}{4}$

Nếu $0,1x-10=0$

$\Rightarrow x=10:0,1=100$

Vậy $x=0; \frac{5}{4}; 100$

b.

$(\frac{1}{4}x-1)-(\frac{5}{6}x+2)-(1-\frac{5}{8}x)=0$

$(\frac{1}{4}x-\frac{5}{6}x+\frac{5}{8}x)-(1+2+1)=0$

$\frac{1}{24}x-4=0$

$x=4: \frac{1}{24}=96$

a.=> \(\frac{\left(\frac{1}{3}\right).x}{\frac{2}{3}}=\frac{\frac{7}{4}}{\frac{2}{5}}\)

=> \(\frac{1}{3}.x=\frac{7}{4}.\frac{2}{3}:\frac{2}{5}\)

=>\(\frac{1}{3}.x=\frac{35}{12}\)

=> x\(=\frac{35}{12}:\frac{1}{3}\)

Vậy x=\(\frac{35}{4}\).

b. => \(\frac{4,5}{0,3}=\frac{2,25}{0,1.x}\)

=>\(0,1.x=\frac{2,25.0,3}{4,5}\)

=>\(0,1.x=0,15\)

=>\(x=0,15:0,1\)

Vậy x=1,5

c. =>\(\frac{8}{\frac{1}{4}.x}=\frac{2}{0,02}\)

=>\(\frac{1}{4}.x=\frac{8.0,02}{2}\)

=>\(\frac{1}{4}.x=0,08\)

=>\(x=0,08:\frac{1}{4}\)

Vậy x=0,32.

d. =>\(\frac{3}{\frac{9}{4}}=\frac{\frac{3}{4}}{6.x}\)

=>\(3.6x=\frac{9}{4}.\frac{3}{4}\)

=>\(18x=\frac{27}{16}\)

=>\(x=\frac{27}{16}:18\)

Vậy x=\(\frac{3}{32}\)

a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)

\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)

\(\Rightarrow\frac{1}{3}.x=\frac{35}{8}.\frac{2}{3}\)

\(\Rightarrow\frac{1}{3}.x=\frac{35}{12}\)

\(\Rightarrow x=\frac{35}{12}:\frac{1}{3}\)

\(\Rightarrow x=\frac{35}{4}\)

Vậy \(x=\frac{35}{4}\)

a) x= \(\frac{35}{4}\)

(x + 0,1).(x - 2/7) = 0

x + 0,1 = 0 hoặc x - 2/7 = 0

*) x + 0,1 = 0

x = 0 - 0,1

x = -0,1

*) x - 2/7 = 0

x = 0 + 2/7

x = 2/7

Vậy x = -0,1; x = 2/7

\(\left(0,1\right)^4.\left(0,1\right)^2.10^4\)

\(=\frac{1}{10^4}.10^4.\frac{1}{10^2}\)

\(=1.\frac{1}{100}=\frac{1}{100}\)

Ta có :

(0,1)⁴ x (0,1)² x 10⁴

=( 0,1 x 10)⁴ x 0,01

= 1⁴ x 0,01

= 0,01

giúp mik vs 4h 30 ) hc rồi

a) 5/3 : 0,5 = 4/3 : 0,1 . x

10/3 = 40/3.x

x = 1/4

b) 18¹⁶ = 2x.3³²

2¹⁶.(3²)¹⁶ = 2x .3³²

2¹⁶.3³² = 2x.3³²

=> 2¹⁶ = 2.x

=> x = 2¹⁶ : 2 = 2¹⁵

\(a.\frac{5}{3}:0,5=\frac{4}{3}:0,1\times x\)

\(\Leftrightarrow\frac{4}{3}:0,1\times x=\frac{10}{3}\)

\(\frac{4}{3}:0,1=\frac{10}{3}:x\)

\(\frac{40}{3}=\frac{10}{3}:x\)

\(\Rightarrow x=\frac{10}{3}:\frac{40}{3}\)

\(x=\frac{1}{4}\)

\(b.18^{16}=2x.3^{32}\)

\(2^{16}.\left(3^{16}\right)^2=2x.3^{32}\)

\(2^{16}.\left(3^{32}\right)=2x.3^{32}\)

\(2^{16}=2x\)

\(\Rightarrow x=2^{16}:2\)

\(x=2^{15}\)

\(\)

a)4,5:0,3=2,25:(0,1.x)

   2,25:(0,1.x)=15

   0,1.x=0,15

   x=0,15:0,1

   x=1,5

Vậy x=1,5

b)8:\(\left(\frac{1}{4}.x\right)\)=2:0,02

   8:\(\left(\frac{1}{4}.x\right)\)=100

       \(\left(\frac{1}{4}.x\right)\)=\(\frac{8}{100}\)

        x=\(\frac{8}{100}\):\(\frac{1}{4}\)

         x=\(\frac{8}{25}\)

Vậy x=\(\frac{8}{25}\)

c)\(3:2\frac{1}{4}=\frac{3}{4}:\left(6.x\right)\)

   \(\frac{3}{4}:\left(6.x\right)=\frac{4}{3}\)

    6.x=\(\frac{3}{4}:\frac{4}{3}\)

    6.x=\(\frac{9}{16}\)

    x=\(\frac{9}{16}\):6

    x=\(\frac{3}{32}\)

Vậy x=\(\frac{3}{32}\)

a.

\(4,5\div0,3=2,25\div\left(0,1\times x\right)\)

\(2,25\div\left(0,1\times x\right)=15\)

\(0,1\times x=\frac{2,25}{15}\)

\(0,1\times x=0,15\)

\(x=\frac{0,15}{0,1}\)

\(x=1,5\)

b.

\(8\div\left(\frac{1}{4}\times x\right)=2\div0,02\)

\(8\div\left(\frac{1}{4}\times x\right)=100\)

\(\frac{1}{4}\times x=\frac{8}{100}\)

\(\frac{1}{4}\times x=\frac{2}{25}\)

\(x=\frac{2}{25}\div\frac{1}{4}\)

\(x=\frac{2}{25}\times4\)

\(x=\frac{8}{25}\)

c.

\(3\div2^1_4=\frac{3}{4}\div\left(6\times x\right)\)

\(\frac{3}{4}\div\left(6\times x\right)=3\div2,25\)

\(\frac{3}{4}\div\left(6\times x\right)=\frac{4}{3}\)

\(6\times x=\frac{3}{4}\div\frac{4}{3}\)

\(6\times x=\frac{3}{4}\times\frac{3}{4}\)

\(6\times x=\frac{9}{16}\)

\(x=\frac{9}{16}\div6\)

\(x=\frac{9}{16}\times\frac{1}{6}\)

\(x=\frac{3}{32}\)

\(-2,\left(6\right).x=0,1\left(6\right)\\ \Leftrightarrow x=0,1\left(6\right):-2,\left(6\right)\\ \Leftrightarrow x=\left[0,1+\dfrac{6.1}{99}\right]:\left[-2-\dfrac{6.1}{9}\right]\\ \Leftrightarrow x=-\dfrac{53}{880}\)

\(-2,\left(6\right).x=0,1\left(6\right)\)

\(\Leftrightarrow\dfrac{-8}{3}x=\dfrac{1}{6}\)

\(\Rightarrow x=\dfrac{1}{6}:\dfrac{-8}{3}\)

\(\Rightarrow x=\dfrac{-1}{16}\)

( ko chắc chắn mấy )