Respuestas

2013-04-09T04:11:00+02:00

1: -(-2h+6) = -26

      2h - 6 = -26

     2h = -20

      h = -10

2: -7(x+5) = 105

    7x + 35 = 105

    7x = 70

    x = 10

3: 4(x+4) = 2(x+2)

     4x + 16 = 2x + 4

    2x =-12

x = -6

4: 5(x-3) -2.5 = 20

 5x - 15 - 2*5? = 20

 5x - 25 = 20

5x = 55

x = 11

5: -(-2x+5) = -2 (x+4)+19

2x - 5 = -2x - 8 + 19

4x - 5 = -8 + 19

4x - 5 - 11 = 0

4x - 16 =0

4x = 16

x = 4

 

 

 

6: 3/4 y= 5/6

 

Multiplicas cruzado

 

3*6 = 5*4y

18 = 20y

18/20 = y

9/10= y

 

sALUDOS  , hice lo que entendi porque hay un ejercicio 2.5 que puede ser 2,5 o 2*5 ai vés tu.

 

 

  • Usuario de Brainly
2013-04-09T04:19:48+02:00

1: -(-2h+6) = -26

+2h - 6 = - 26

2h = - 26 + 6

h = - 20 / 2

h = - 10

 

2: -7(x+5) = 105

-7x - 35 = 105

-7x = 105 + 35

x = 140 / - 7

x  = - 20

 

3: 4(x+4) = 2(x+2)

4x + 16 = 2x + 4

4x - 2x  = 4 - 16

2x = - 12

x  = - 6

 

 

4: 5(x-3) -2.5 = 20

5x - 15 - 2.5 =  20

5x - 17 .5 =  20

5x = 20 + 17.5

x = 37.5 /5

x= 7.5

 

 

5: -(-2x+5) = -2 (x+4)+19

+ 2x - 5 = -2x - 8 + 19

2x  + 2x = - 8 + 19 + 5

4x = 16

x = 16/4

x = 4

 

 

6: 3/4 y= 5/6

y = 5/6 :  3/4

y = 24/18

y = 4/3

 

espero que te sirva, salu2!!!!