svp aider moi pour le C

Bonsoir,,

( 5/6 + 7/12 ) x 3/5
= ( 10/12 + 7/12 ) x 3/5
= 17/12 x 3/5
= 51/60

bonjour

c = (5/6+7/12) x 3/5
c =(10/12+7/12) x3/5
c = 17/12 x 3/5
c = 17/4 x 1/5
c = 17/20