12x-33=3².3³

=>12x-33=3⁵

=>12x-33=243

=>12x=243+33=276

=>x=276:12=23

vậy x=23

a. x+55=30

x=30-55

x=-25

b. 12x-33=3

12x=3+33

12x=36

x=3

\(2\left(x+55\right)=60\)

\(x+55=60:2\)

\(x+55=30\)

\(x=30-55\)

\(x=-25\)

vậy \(x=-25\)

\(12x-33=3^{2015}:3^{2014}\)

\(12x-33=3^{2015-2014}\)

\(12x-33=3\)

\(12x=36\)

\(x=3\)

vậy \(x=3\)

=> 12x-33 = 3

=> 12x = 3+33 = 36

=> x = 36 : 12 = 3

Vậy x=3

k mk nha

12x-33=3²⁰¹⁸:3²⁰¹⁷

^12x-33=3

^12x=3+33

^12x=36

^x=36:12

^x=3

a) 541 + (218 - x) = 735

\(\Rightarrow\) 218 - x = 735 - 541

\(\Rightarrow\) 218 - x = 194.

\(\Rightarrow\) x = 218 - 194

\(\Rightarrow\) x = 24

b) 5(x + 35) = 515

\(\Rightarrow\) x + 35 = 515 : 5 = 103.

\(\Rightarrow\) x = 103 - 35

\(\Rightarrow\) x =68.

c) 96 - 3(x + 1) = 42

\(\Rightarrow\) 3(x + 1) = 96 - 42 = 54

\(\Rightarrow\) x + 1 = 54 : 3

\(\Rightarrow\) x = 18 - 1

\(\Rightarrow\) x = 17

d) 12x - 33 = 3² . 3³

\(\Rightarrow\) 12x - 33 = 243

\(\Rightarrow\)12x = 243 + 33

\(\Rightarrow\) 12x = 276.

\(\Rightarrow\) x = 23.

a) 541 + (218 - x) = 735

Suy ra 218 - x = 735 - 541 hay 218 - x = 194.

Do đó x = 218 - 194. Vậy x = 24.

b) 5(x + 35) = 515 suy ra x + 35 = 515 : 5 = 103.

Do đó x = 103 - 35 =68.

c) Từ 96 - 3(x + 1) = 42 suy ra 3(x + 1) = 96 - 42 = 54. Do đó x + 1 = 54 : 3 = 18. Vậy x = 18 - 1 hay x = 17.

d) Từ 12x - 33 = 3² . 3³ hay 12x - 33 = 243 suy ra 12x = 243 + 33 hay 12x = 276. Vậy x = 23.

Bài 1:

a) \(2^{23}.2^5\)

\(\Leftrightarrow2^{23+5}\)

\(\Leftrightarrow2^{28}\)

b) \(10^8:10^2\)

\(\Leftrightarrow10^{8-2}\)

\(\Leftrightarrow10^6\)

c) \(a^6:a\)

\(\Leftrightarrow a^{6-1}\)

\(\Leftrightarrow a^5\)

Bài 2:

\(5.4^2-18:3^2\)

\(\Leftrightarrow5.16-18:9\)

\(\Leftrightarrow80-2\)

\(\Leftrightarrow78\)

b) \(12x-33=3^2.3^3\)

\(\Leftrightarrow12x-33=3^{2+3}\)

\(\Leftrightarrow12x-33=3^5\\ \Leftrightarrow12x-33=243\)

\(\Leftrightarrow12x=243+33\)

\(\Leftrightarrow12x=276\)

\(\Leftrightarrow x=\frac{276}{12}\)

\(\Leftrightarrow x=23\)

       Mình giải vậy đó dựa vào cách đó mà làm :)  :)  :) :)

\(2^{23}.2^5=2^{28}\)                                                                                                                                                                               \(10^8:10^2=10^6\)                                                                                                                                                                        \(a^6:a=a^5\)

a)x=24

b)x=17

c)x=68

d)x=23

541 + ( 218 - x ) = 735 

  <=>   218 - x   = 735 - 541 

<=>    218 - x    = 194

<=>           x      = 218 - 194 

<=>          x      =  24 

.... 

\(12x-33=3^2.3^3\)

\(\Rightarrow12x-33=3^5=243\)

\(\Rightarrow12x=276\Rightarrow x=23\)

Vậy x = 23

12x - 33 = 243

12x = 243 + 33

12x = 278

x = 278 : 12

x = 24

12x-33=243

<=> 12x= 243-33= 210

<=> x= 210:12

<=> x= 17,5

Ta có : 4,5 - 2x * 147 = 11/14 .

⇒ 9/2 - 2x * 147 = 11/14 .

⇒ 2x * 147 = 9/2 - 11/14 .

⇒ 2x * 147 = 63/14 - 11/14 .

⇒ 2x * 147 = 26/7 .

⇒ 2x = 26/7 : 147 .

⇒ 2x = ( 26 * 147 ) / 7 .

⇒ 2x = 78 .

⇒ x = 78 : 2 .

⇒ x = 39 .

Vậy x = 39 .

\(4,5-2x\cdot147=\dfrac{11}{14}\\ 2x\cdot147=4,5-\dfrac{11}{14}\\ 2x\cdot147=\dfrac{52}{14}\\ 2x=\dfrac{52}{14}:147\\ 2x=\dfrac{26}{1029}\\ x=\dfrac{26}{1029}:2\\ x=\dfrac{13}{1029}\\ Vậy...\)