bonjour
- 25 + ( 13 - x ) = ( x + 3 ) - ( 6 - x )
- 25 + 13 - x = x + 3 - 6 + x
- x - x - x = 3 - 6 + 25 - 13
- 3 x = 9
x = - 3
8 + 7 ( - x - 2 ) = 2 ( x + 2 ) - 3 ( 3 x - 1 )
8 - 7 x - 14 = 2 x + 4 - 9 x + 3
- 7 x - 2 x + 9 x = 4 + 3 - 8 + 14
0 x = 3
pas de solution
2 x /3 - ( 5 - 3 x ) 9 = 4 /6 + ( 2 x - 1 ) / 18
12 x /18 - ( 10 - 6 x ) /18 = 12/18 + ( 2 x - 1 ) / 18
12 x - 10 + 6 x = 12 + 2 x - 1
18 x - 2 x = 11 + 10
16 x = 21
x = 21/16
adultes = x
enfants = x - 30
180 x + 64 ( x - 30 ) = 17 600
180 x + 64 x - 1 920 = 17 600
244 x = 17 600 + 1 920
244 x = 19 520
x = 80
adultes = 80 Dh
