\(a.\frac{1,35}{0,2}=\frac{1,25}{0,1x}\)

\(\frac{0,2\cdot1,25}{1,35}=0,1x\)

0,8 = 0,1x

x=8

b. 2x - 3 = x + 1/2

2x - 3 - x - 1/2=0

x-3,5 = 0

x= 3,5

c. (3x - 1/4 ) * ( x+ 1/2)=0

\(27x^2\left(x+1\right)-\left(3x+1\right)^3=-8\)

\(\Rightarrow27x^3+27x^2-27x^3-27x^2-9x-1=-8\)

\(\Rightarrow-9x-1=-8\)

\(\Rightarrow-9x=-7\)

\(\Rightarrow x=\frac{7}{9}\)

\(27x^2\left(x+1\right)-\left(3x+1\right)^3\)

\(27x^3+27^2-27x^3-27x^2-9x-1=-8\)

\(-9x-1=-8\)

\(-9x=-7\)

\(x=\frac{7}{9}\)

27x^2(x+1)-(3x+1)^3=-8

=>27x^3+27x^2-(27x^3+27x^2+9x+1)=-8

=>27x^3+27x^2-27x^3-27x^2-9x-1=-8

=>-9x=-7 =>x=7/9

      vậy x = 7/9

a)

\(219-7\left(x+1\right)=100\)

\(\Rightarrow7\left(x+1\right)=119\)

\(\Rightarrow x+1=17\)

=> x = 16

Vậy x = 16

b)

\(\left(3x-6\right)3=3^4\)

\(\Rightarrow\left(x-2\right)3^2=3^4\)

=> x - 2 = 9

=> x = 7

Vậy x = 7

Giải:

a, 219 - 7(x + 1) = 100

7(x + 1) = 219 - 100

7(x + 1) = 119

x + 1 = 119 : 7

x + 1 = 17

x = 17 - 1

x = 16

b, (3x - 6) . 3 = 3⁴

(3x - 6) . 3 = 81

3x - 6 = 81 : 3

3x - 6 = 27

3x = 27 + 6

3x = 33

x = 33 : 3

x = 11

\(a,\)\(x+x+2x=164\)

\(\Rightarrow4x=164\)

\(\Rightarrow x=41\)

a, x+x+2x=164 

    4x=164

     x= 164:4

      x=41

a x + x + 2x = 164

4x = 164

x = 164 : 4 

x = 41

x.34=1

x=1/34

K mình nhé bạn

x= 1/34

one piece