Réponse :
Explications étape par étape
Bonsoir
Somme :
20/7 + 5/14 + 15/7 = 40/14 + 5/14 + 30/14 = 75/14
20/7 | 5/14 | 15/7
15/14 | A ....| B
C ......| D ....| E
20/7 + 15/14 + C = 75/14
C = 75/14 - 20/7 - 15/14
C = 60/14 - 40/14
C = 20/14
C = 10/7
10/7 + A + 15/7 = 75/14
A = 75/14 - 20/14 - 30/14
A = 25/14
15/14 + 25/14 + B = 75/14
B = 75/14 - 15/14 - 25/14
B = 35/14
B = 5/2
5/14 + 25/14 + D = 75/14
D = 75/14 - 5/14 - 25/14
D = 45/14
10/7 + 45/14 + E = 75/14
E = 75/14 - 20/14 - 45/14
E = 10/14
E = 5/7
20/7 | 5/14 ...| 15/7
15/14 | 25/14.| 5/2
10/7 .| 45/14 .| 5/7
