43x37+93x43+57x61+69x57=13000

1300

ai bấm sai thì cứ bấm 

nhưng mình đúng thì vẫn là thật

ok bn hiền

a,12345679x45=12345679x9x5=111111111x5=555555555

b,43 x 37+93 x 43+57 x 61+69 x 57

=43x(37+93)+57(61+69)

=43 x 130+57 x 130

=130 x(43+57)

=130 x 100

=13000

     43 x 27 + 93 x 43 + 57 x 61 + 59 x 57 

  = 43 x ( 27 + 93 ) + 57 x ( 61 + 59 )

  =  43 x 120 +  57 x 120

  = 120 x ( 43 + 57 )

   = 120 x 100

  = 1200

b) 64 x 6 + 81 x 4 + 17 x 6 

 = 6 x ( 64 + 17 ) + 81 x 4 

 =  6 x 81 + 81 x 4 

 = 81 x ( 6 + 4 ) 

 = 81 x 10 

 = 810

A) =43 x (27+93)+57*(61+59)

=43*120+57*120

=120*(43+57)

=120*100

=12000

7 x 17 x 125 = (8 x 125) x 17 = 1000 x 17 = 17000

4 x 37 x 25 = (25 x 4 ) x 7 = 100 x 7 = 700

43 x 27 + 93 x 43 + 57 x 81 + 69 x 57 = 43 x (27 + 93) + 57 x (81 +69) = 43 x 120 + 57 x 120 + 57x30 = 120 x (43 + 57) + 1710 = 12000 + 1710 = 13710 

1)

\(45\left(13+78\right)+9\left(87+22\right)5\)

\(=45\left(13+78\right)+45\left(87+22\right)\)

\(=45\left(13+78+87+22\right)\)

\(=45\left[\left(87+13\right)+\left(78+22\right)\right]\)

\(=45\left[100+100\right]\)

\(=45.200\)

\(=9000\)

2)

\(43+37+93.43+57.61+69.57\)

\(=43\left(37+93\right)+57.\left(61+69\right)\)

\(=43.130+57.130\)

\(=130\left(43+57\right)\)

\(=130.100\)

=13000

=43.37+93.43+57.61+69.57

=43.(37+93)+57.(61+69)

=43.130+77.130

=130.(43+57)

=13000

=9412

nho h cho minh nhe

minh ghi lon cho 57 ma minh ghi 77

2x + x - 12 = 0

=> 3x = 12

=> x = 4

vậy_

2x + x - 12 = 0

2x + x = 0 + 12

2x + x = 12

3x = 12

x= 12 : 3

x = 4

64 .6 + 81 . 4 + 17 . 6

= 6 . ( 64 + 17 ) + 81 . 4

= 6 . 91 + 81 . 4

= 546 + 324

= 870 

43 . 27 + 93 . 43 + 57 . 61 + 59 . 57

= ngày mai giải tiếp, đi ngủ đã !!!-_-^zzz

2x + x - 12 = 0 

<=> 2x + 1x - 12 = 0 

<=> 3x - 12 = 0 

<=> 3x = 0 + 12 

<=> 3x = 12 

<=> x = 12 : 3 

<=> x = 4

Vậy x = 4 

64 . 6 + 81 . 4 + 17 . 6 

= 64 . 6 + 17 . 6 + 81 . 4 

= 6 . ( 64 + 17 ) + 81 . 4 

= 6 . 81 + 81 . 4 

= 81 . ( 6 + 4 ) 

= 81 . 10 

= 810 

43 . 27 + 93 . 43 + 57 . 61 + 59 . 57 

= 43 . ( 27 + 93 ) + 57 . ( 61 + 59 ) 

= 43 . 129 + 57 . 120 

= 120 . ( 43 + 57 ) 

= 120 . 100 

= 12 000

x - 43 = ( 57 - x ) - 50

x - 43 = 57 - x - 50

x + x  = 57 - 50 + 43

2x      = 50

  x      = 25

`@` `\text {Ans}`

`\downarrow`

\(\left(8x-16\right)\cdot\left(x-4^3\right)=0\)

\(\Rightarrow\) \(\left[{}\begin{matrix}8x-16=0\\x-4^3=0\end{matrix}\right.\)

`\Rightarrow`\(\left[{}\begin{matrix}8x=16\\x=64+0\end{matrix}\right.\)

`\Rightarrow`\(\left[{}\begin{matrix}x=16\div8\\x=64\end{matrix}\right.\)

`\Rightarrow`\(\left[{}\begin{matrix}x=2\\x=64\end{matrix}\right.\)

Vậy, \(x\in\left\{2;64\right\}\)

(8\(x\) -16)(\(x-4^3\)) = 0

\(\left[{}\begin{matrix}8x-16=0\\x-4^3=0\end{matrix}\right.\)

\(\left[{}\begin{matrix}8x=16\\x=64\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=2\\x=64\end{matrix}\right.\)

Vậy \(x\in\) { 2; 64}

Kurouba ryousuke

4³ mà em ơi

4³ = 64 mà em