Réponse :
Explications étape par étape
Bonjour
( )
( )( )
( )(16/42)( )
( 1/3 )( 1/21 )( )( 2/3 )
1/3 + 1/21 = 7/21 + 1/21 = 8/21
16/42 - 1/21 = 8/21 - 1/21 = 7/21 = 1/3
1/3 + 2/3 = 3/3 = 1
8/21 + 16/42 = 16/42 + 16/42 = 32/42 = 16/21
16/42 + 1 = 16/42 + 42/42 = 58/42 = 29/21
16/21 + 29/21 = 45/21 = 15/7
( 15/7)
(16/21 )(29/21 )
(8/21 )(16/42)(1 )
( 1/3 )( 1/21 )(1/3 )( 2/3 )
