Répondre :
4/3 - 1 / 7/6 - 2
= 4/3 - 1 x 6/7 - 2
= 28/21 - 18/21 - 42/21
= 20/21 - 42/21
= -22/21
= 4/3 - 1 x 6/7 - 2
= 28/21 - 18/21 - 42/21
= 20/21 - 42/21
= -22/21