Répondre :
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
=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