Réponse :
bonjour
4 ( 2 - x ) + 5 = - 3 ( 2 x + 3 ) - 12
8 - 4 x + 5 = - 6 x - 9 - 12
- 4 x + 6 x = - 9 - 12 - 8 - 5
2 x = - 34
x = - 17
( 3 x + 1 ) / 4 = ( 5 x- 2 ) / 5
15 x + 5 = 20 x - 8
15 x - 20 x = - 8 - 5
- 5 x = - 13
x = 13/5
x/3 + 5/3 = 1/2 - x
2 x /6 + 10/6 = 3/6 - 6 x / 6
2 x + 7 x = 3 - 10
9 x = - 7
x = - 7/9
x - ( x + 1 ) = ( x + 3 ) - ( x - 3 )
x - x - 1 = x + 3 - x + 3
- x + x = 3 + 3 + 1
0 x = 7
pas de solution
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