bonjour
C = 1 - ( 2/3 + 1/4 )
C = 12/12 - ( 8/12 + 3/12 )
C = 12/12 - 11 /12
C = 1/12
D = ( 3 - 5/2) : ( 1 + 1 /5 )
D = ( 6/2 - 5/2 ) : ( 5/5 + 1 /5 )
D = 1 /2 : 6 /5
D = 1/2 x 5/6
D = 5/12
35/8 x 4/5 = 140/40 = 7 / 2
E = 7/2
1/12 + 5/12 + 7/2
= 1 /12 + 5/12 + 42/12
= 48/4
= 12
