Respuestas

  • Usuario de Brainly
2013-03-13T23:39:51+01:00

1/2.x+1/4=1/8.x+2/5

1x/2 - 1x/8 = 2/5 - 1/4

4x/8 - 1x/8 = 8/20 - 5/20

3x/8 = 3/20

x = 3/20 : 3/8

x = 2/5

 

 

 75/100x+12=1/2x+17

1x/4 + 12 = 1x/2 + 17

1x/4 - 1x/2 = 17 - 12

1x/4 - 2x/4 = 5

 - 1x/4 = 5

x = 5 : - 1/4

x = - 20

 

3/10x+1/2+2/5=-1/10x+8+3

3x/10 + 1/2 + 2/5 = -1x/10 + 8 + 3

3x/10 + 1x/10 = 8 + 3 - 2/5 - 1/2

2x/10 = 11 - 2/5 -1/2

2x/10 = 110/10 - 4/10 - 5/10

x = 101/10 : 2/10

x = 101/2

 

 

77.8x+9 -2= -  8x+99.9

616x + 9 -2 =  - 8x + 891

616x + 8x = 891 + 2 - 9

624x = 884

x = 884/624

x = 1,41666.....

 

 

21/12x+85-33= - 1/100x-39+8

7x/4 + 85 - 33 = -x/100 - 39 + 8

7x/4 + x/100 = -39 + 8 + 33 -85

175x/100 + x/100 =  - 83

75x/100 =  - 83

x = - 83 : 75/100

x = - 83 : 3/4

x = -332/3

 

 

55x+ x - 12x +39=- x  + x - x +1/2-3/5+3/9

 44x + 39 = - x + 3981/90

44x + x = 3981/90 - 39

45x = 471/90

x = 471/90 : 45

x = 157/1350

 

espero que te sirva, salu2!!!