A= 1/5/18+1/-7/12

B= 1/2-1/3-3*5/18+2-7/12



Sagot :

B = 3/6-1/6-15/18+24/12

B = 9/18 - 3/18 - 15/18 + 36/18

B = 9-3-15+36/18

B = 27