( 57 - 3 × X ) × 12 - 24 = 47 × 2 - 82

( 57 - 3 × X ) × 12 - 24 = 94 - 82

( 57 - 3 × X ) × 12 - 24 = 12

( 57 - 3 × X ) × 12 = 12 + 24

( 57 - 3 × X ) × 12 = 36

57 - 3 × X = 36 : 12

57 - 3 × X = 3

3 × X = 57 - 3

3 × X = 54

      X = 54 : 3

      X = 18

( 57 - 3 × X ) × 12 - 24 = 47 × 2 - 82

= ( 57 - 3 × X ) × 12 - 24 = 94 - 82

= ( 57 - 3 × X ) × 12 - 24 = 12

= ( 57 - 3 × X ) × 12 = 12 + 24

= ( 57 - 3 × X ) × 12 = 36

= 57 - 3 × X = 36 : 12

= 57 - 3 × X = 3

= 3 × X = 57 - 3

= 3 × X = 54

      X = 54 : 3

      X = 18

cảm ơn

5 số 5 : (5+5) ⁵  . (5+5)

nó sai đề bài

706,308

2.x² = 18

 x² = 18 : 2

x² = 9

x² = 3²

\(\Rightarrow\)x = 3

( 2⁰ + 2¹ + 2² ) . x - 3 = 18

=> ( 1 + 2 + 4 ) . x = 21

=> 7 . x = 21

=> x = 21 : 7 = 3

2 . x² = 18

=> x² = 9

=> x² = 3² = ( -3 )²

\(\Rightarrow\orbr{\begin{cases}x=3\\x=-3\end{cases}}\)

Trả lời :

a) 8³ = ( 2³ )³ = 2⁹

b) 3⁹ 

c) 5³

~~Học tốt~~

2 . 29 . 3 + 6 . 71 + 120

= 6 . 29 + 6 . 71 + 6 . 20

= 6 . ( 29 + 71 + 20 )

= 6 . 120

= 720

Tính nhanh:

2 . 29 . 3 + 6 . 71 + 120

( 29 + 71 ) + 120 + ( 3 + 6 . 2 )

100 + 120 + 36

220 + 36 

256

bằng 2 nhé

2 k nha ho

Vì \(1-\frac{41}{61}=\frac{200}{610}\);\(1-\frac{411}{611}=\frac{200}{611}\)

mà \(\frac{200}{610}>\frac{200}{611}\)

\(\Rightarrow\)\(\frac{41}{61}< \frac{411}{611}\)