Respuestas

2012-06-01T15:16:51+02:00

1/2x-2x+20 < 3/4x+1

1/2x-2x+20 < 7/4

     1/2x-2x < 7/4 - 20

         -3/2x < -73/4

               x < -73/4 : (-3/2)

               x < 73/6

             

SALUDOS