Sagot :

rodianoudogbessi251

Réponse:

B=(7/4-7/6) x9/2

B=[[(7x6)-(7x4)]÷6]x 9/2

B=[[(36-28)]÷6] x 9/2

B=(8÷6) x9/2

B=(8/6)x 9/2

B=72/12

B=6