bonjour
dans la 1 , manquent les variables
5 x - 6 = 4 - 3 x
5 x + 3 x = 4 + 6
8 x = 10
x = 10/8 = 5/4
- 7 m + 15 = 2 m - 3
- 7 m - 2 m = - 3 - 15
- 9 m = - 18
m = 2
13 a + 11 = 7 a + 29
13 a - 7 a = 29 - 11
6 a = 18
a = 3
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bonjour
dans la 1 , manquent les variables
5 x - 6 = 4 - 3 x
5 x + 3 x = 4 + 6
8 x = 10
x = 10/8 = 5/4
- 7 m + 15 = 2 m - 3
- 7 m - 2 m = - 3 - 15
- 9 m = - 18
m = 2
13 a + 11 = 7 a + 29
13 a - 7 a = 29 - 11
6 a = 18
a = 3