Réponses

2013-12-03T18:43:21+01:00
A = 3x+1/2
   =3(8/9)+1/2
   =24/9+1/2
   =48/18+9/18=57/18
B = 1/4x-11/6
   =1/4(8/9)-11/6
   =8/36-11/6
   =8/36-66/36=-58/36 ou -29/18
C = x:4/3+4/3
   =8/9 : 4/3 +4/3
   =8/9x3/4 +4/3
   =24/36+4/3
   =24/36+48/36=72/36 ou 2