Bonjour aidez moi silvouplais :) Merci de tout detailler :) 14/5 : 21/10 - 2/7 = 6/7 x ( 1/9 -1 ) = 12/7 x 14/10 = 11/7 - 5/7 x 2/3 = 7/2 - 3/5 tout sur 1/5 =

bonsoir

14/5  x 10/21 - 2/7 = 140/ 105 - 2/7 = 4/3 - 2/7 = 28/21 - 6/21 = 22 /21

6/7 x ( 1/9 -1) = 6/7 x ( 1/9 - 9/9) = 6/7 x - 1/9 = - 6/63 = - 2/ 21

12/7 x 14/10 = 168/70 = 12/5

( 7/2 - 3/5) / 1/5 = ( 35/10 - 6/10) : 1/5  = 29/10 x 5 = 145/10 = 29/2