Question

Necesito saber la solución de estas actividades.
(-3)·(+2) - [(-4) + (-4) - (-5)] · (-4) =

5/8 de 24 =
7/9 de 504 =

3/4 - 1/3 - 2/12 + 5/6 =
(4 + 3/4) - (3 + 2/3) =

3(2x +1) = 3(2 - x) =
2x = 5 - 2 (2x + 1) =

Answer 1

(- 3) ( 2) - [(- 4) + (- 4) - (- 5)] (- 4)

- 3 * 2 - [- 4 - 4 + 5 ] (- 4)

- 6 - [ - 3] (- 4)

- 6 - 3 * 4

- 6 - 12

- 18

Solución : 

- 18
-----------------------------------

5/8 de 24 : 

(5 * 24)/8

120/8

15

Solución : 5/8 de 24 es = 15
----------------------------------------

7/9 de 504  

(7 * 504)/9

3528/9

392

Solución : 

7/9 de 504 es = 392
------------------------------------------

3/4 - 1/3 - 2/12 + 5/6----sacas el mcm.

Descomponemos.

4 - 3 - 12 - 6 l 2
2 - 3 -   6 - 3 l 2
1 - 3 -   3 - 3 l 3
1 - 1 -   1 -  1

El mcm es = 12
 
   9 - 4 - 2 + 10          13
---------------------- =  -------
           12                  12

Solución : 

13/12
----------------------------------

(4 + 3/4) - (3 + 2/3)

(3/4 + 4) - (2 + 3 * 3)/3

(3 + 4 * 4) - (2 + 3 * 3)/3

(3 + 16) - (2 + 9)/3

(3 + 16)/4 - 11/3

(3 * 19 + 4 (- 11))/12

(57 + 4 (- 11))/12

(57 - 44)/12


13/12

Solución : 

13/12
------------------------------------

3 (2x + 1) = 3 (2 - x)

6x + 3 = 6 - 3x

6x + 3x = 6 - 3

9x = 3

x = 3/9

x = 1/3

Solución : 

x = 1/3
---------------------------------------


2x = 5 - 2 (2x + 1)

2x = 5 - 4x - 2

2x + 4x = 5 - 2

6x = 3

x = 3/6

x = 1/2

Solución : 

X = 1/2

Suerte!!!