Respuestas

2012-04-05T04:57:00+02:00

2-4(2x/7 + 1/7)= 3/2 -x

  2 - 8x/7 - 4/7= 3/2 -x

    2 - 4/7 - 3/2= -x + 8x/7

               -1/14= 1x/7

                 -1/2= x

 

 

 

2012-04-05T05:10:39+02:00

2 - 4 (2x/7 + 1/7) = 3/2 - x

-2 (2x+1/7) = 3/2 - x

-4x - 2/7 = 3 - 2x/2

2(-4x - 2) = 7(3 - 2x)

-8x - 4 = 21 - 14x

6x = 24

x = 4