Sagot :
Réponse :
bonjour
P 1
x
3 x
3 x + 25
2 ( 3 x + 25 )
= 6 x + 50
P 2
x
x + 10
11 ( x + 10 ) = 11 x + 110
11 x + 110 + 3
= 11 x + 113
P 3
x
12 x
12 x + 1
3 ( 12 x + 1 ) = 36 x + 3
36 x + 3 - 6 x
30 x + 3 + 7
= 30 x + 10
1. 6 x + 50 = 80
6 x = 80 - 50
6 x = 30
x = 5
2. 11 x + 113 = 80
11 x = 80 - 113
11 x = - 33
x = - 3
3. 30 x + 10 = 80
30 x = 70
x = 7/3
4. 6 x + 50 = 11 x + 113
6 x - 11 x = 113 - 50
- 5 x = 63
x = - 63/5 = - 12.6
Explications étape par étape :