Répondre :
bonjour,
1. 9 (a+7) = 9a + 63
2. 10(x-6) = 10x - 60
3. (5x-2)*8 = 40x - 16
4.
5. (3+7x) *k = 3k+21xk
1. 9 (a+7) = 9a + 63
2. 10(x-6) = 10x - 60
3. (5x-2)*8 = 40x - 16
4.
5. (3+7x) *k = 3k+21xk