\(\left[\left(3^{14}\times69+3^{14}\times12\right):3^{16}-7\right]:2^4\)

\(=\left[3^{14}\left(69+12\right):3^{16}-7\right]:2^4\)

\(=\left[3^{14}.81:3^{16}-7\right]:2^4\)

\(=\left[3^{14}.3^4:3^{16}-7\right]:2^4\)

\(=\left[3^2-7\right]:2^4\)

\(=2:2^4\)

\(=\dfrac{2}{16}=\dfrac{1}{8}\)

\(\left[\left(3^{14}.69+3^{14}.12\right):3^{16}-7\right]:2^4\\ =\left[3^{14}.\left(69+12\right):3^{16}-7\right]:2^4\\ =\left[3^{14}.81:3^{16}-7\right]:2^4\\ =\left[3^{14}.3^4:3^{16}-7\right]:2^4\\ =\left(3^2-7\right):2^4=2:2^4=\dfrac{1}{2^3}=\dfrac{1}{8}\)

\(=\left(\dfrac{3^{14}\cdot\left(69+12\right)}{3^{16}}-7\right):2^4\)

=(3^2-7):2^4

=2:2^4=1/8

2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 9

=(2 x 18) x 14 + (3 x 12) x 17 + (4 x 9) x 69

=36 x 4 + 36 x 17 + 36 x 69

= 36x( 4+17+69)

=36x100

=3600

Chúc bạn học tốt ^_^

2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 9

=(2 x 18) x 14 + (3 x 12) x 17 + (4 x 9) x 69

=36 x 4 + 36 x 17 + 36 x 69

= 36x( 4+17+69)

=36x100+

=3600

\(2.18.14+3.17.12+4.69.9\)

\(=\left(2.18\right).14+\left(3.12\right).17+\left(4.9\right).69\)

\(=36.4+36.17+36.69\)

\(=36.\left(4+17+69\right)\)

\(=36.100\)

\(=3600\)

~ Rất vui vì giúp đc bn ~

2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 6

= (2 x 18) x 14 + (3 x 12) x 17 + (4 x 6) x 69

= 36 x (14 + 17 + 69)

= 36 x 100

= 3600

\(2.18.14+3.17.12+4.69.6\)

\(=\left(2.18\right).14+\left(3.12\right).17+\left(4.6\right).69\)

\(=36.14+36.17+24.69\)

\(=36.\left(14+17\right)+24.69\)

\(=36.31+24.69\)

\(=4.9.31+4.6.69\)

\(=4.\left(9.31+6.69\right)\)

\(=4.\left(279+414\right)\)

\(=4.693\)

\(=2772\)

Jennie Kim làm sai từ dòng thứ 3 rồi nha bn

~ Rất vui vì giúp đc bn ~

2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 9

= { 2 x 18 } x 14 + { 12 x 3 } x 17 + { 4 x 9 } x 69

= 36 x 14 + 36 x 17 + 36 x 69

= 36 x { 14 + 17 + 69 }

= 36 x 100

= 3600

2 × 18 × 14 + 3 × 17 × 12 + 4 × 69 × 9

= 2 × 18 × 14 + 3 × 12 × 17 + 4 × 9 × 69

= 36 × 14 + 36 × 17 + 36 × 69

= 36 × (14 + 17 + 69)

= 36 × 100

= 3600

2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 9

= { 2 x 18 } x 14 + { 12 x 3 } x 17 + { 9 x 4 } x 69

= 36 x 14 + 36 x 17 + 36 x 69

= 36 x { 14 + 17 + 69 }

= 36 x 100

= 3 600 

-71 + 69 - X + 14 = 69 + 14

-71 +69 - X + 14 = 73

69 - X + 14 = 73 + 71 

69 - X + 14 = 144

- X + 14 = 144 - 69

- X +14 = 75

- X = 75 - 14

- X = 61

Vậy X = - 61

x=(-71) cơ các bạn ạ

= 69 x ( 113 - 27 + 14 ) + 31

= 69 x 100 +31

= 6900 + 31

=6931

=69x(113-27+14)+31

=69x100+31

=6900+31

=6931

69 x 113 - 27 x 69 + 69 x 14 + 31

= 69 x ( 113 - 27 + 14 ) + 31

= 69 x 100 + 31

= 6900 + 31

= 6931

1/ Ta xem phần này trước: \(-\frac{6}{y}=\frac{6}{7}\left(rutgon\right)\)

\(\Rightarrow y=7.\left(-6\right):6=-7\)

Quay lại lúc đầu: \(\frac{x}{14}=\frac{6}{7}\)

\(\Rightarrow x=6.14:7=12\)

2/ \(\Leftrightarrow x-\frac{14}{x}=-3+\frac{2}{3}\)

  \(\Leftrightarrow\frac{3x-2}{3}=-\frac{7}{3}\left(quydong\right)\)

 \(\Leftrightarrow3x-2=-7\)

Giải nốt hộ nha lười quá

\(\frac{x}{14}=\frac{-6}{y}=\frac{6}{7}\)

Ta có :\(\frac{-6}{y}=\frac{6}{7}\)=>\(y=\frac{-6.7}{6}=-7\)

        \(\frac{x}{14}=\frac{6}{7}\)=>\(x=\frac{6.14}{7}\)=12

2/\(\frac{x-2}{3}=\frac{14}{x-3}\)

=>(x-2).(x-3)=14.3=42

Tự làm nhé

\(\left\{\left[3^{14}.69+3^{14}.12\right]:3^{16}-7\right\}:2^4\\ =\left[3^{14}\left(69+12\right):3^{16}-7\right]:2^4=\left[\left(3^{14}.3^4\right):3^{16}-7\right]:2^4\\ =\left(3^2-7\right):2^4=\left(9-7\right):2^4=2:2^4=\dfrac{1}{8}\)

Bạn ơi! Bạn viết sai dấu ngoặc nhé! Mình sửa thành:

[(3¹⁴. 69 + 3¹⁴. 12) : 3¹⁶ - 7] : 2⁴

= {[ 3¹⁴. (69 + 12)] : 3¹⁶ - 7} : 2⁴

= {[ 3¹⁴. 81] : 3¹⁶ - 7} : 2⁴

= {[3¹⁴. 3⁴] : 3¹⁶ - 7} : 2⁴

= {3¹⁸ : 3¹⁶ - 7} : 2⁴

= {3² - 7} : 2⁴

= {9 - 7} : 2⁴

= 2 : 16

= \(\dfrac{1}{8}\)

= 8.

123 -5 . (x + 4) = 38

5 . (x + 4) = 123 - 38 = 85

x + 4 = 85 : 5 = 17

x = 17 - 4 = 13

(3x - 2⁴) . 7³ = 2.7⁴

(3x - 2⁴) = 2.7 = 14

3x - 16 = 14

3x = 14 + 16 = 30

x = 30 : 3 = 10

x=10

cho mình nha