Répondre :
A=4X+5/6+2X/3
= 24x/6 + 5/6 + 4x/6
= 28x/6 + 5/6
B=3X/12-2X+9/4
= 3x/12 - 24x/12 + 27/12
= -21x/12 +27/12
C=2-5/X
= 2x/x -5/x
= 24x/6 + 5/6 + 4x/6
= 28x/6 + 5/6
B=3X/12-2X+9/4
= 3x/12 - 24x/12 + 27/12
= -21x/12 +27/12
C=2-5/X
= 2x/x -5/x