bjr est-ce que vs pouvez maider svp, voici le problème :
il faut résoudre les equations :
1) 2x + 1 = 5x + 13
2) 9x - 11 = 4x +14
3) -12x + 37 = 2x - 5
3) 32x + 108 = 23x -18
il faut résoudre les equations :
1) 2x + 1 = 5x + 13
2) 9x - 11 = 4x +14
3) -12x + 37 = 2x - 5
3) 32x + 108 = 23x -18
Lista de comentários
[tex]bonsoir\\\\\\2 x + 1 = 5 x + 13\\2 x - 5 x = 13 - 1 \\- 3 x = 12 \\x = - 4 \\\\\\9 x - 11 = 4 x + 14 \\9 x - 4 x = 14 + 11 \\5 x = 25\\x = 5 \\\\\\- 12 x + 37 = 2 x - 5 \\- 12 x - 2 x = - 5 - 37\\- 14 x = - 42 \\x = 3 \\\\32 x + 108 = 23 x - 18 \\32 x - 23 x= - 18 - 108\\9 x = - 126 \\x = -14 \\\\[/tex]
Bonsoir,
1) 2x + 1 = 5x + 13
1-13 = 5x -2x
-12= 3x
3x= -12
x = -12/3
x= -4
2) 9x - 11 = 4x +14
9x-4x = 14 +11
5x= 25
x= 25/5
x=5
3) -12x + 37 = 2x - 5
37+5 = 2x+12x
42= 14x
x = 42/14
x= 21/7
x = 3
3) 32x + 108 = 23x -18
32x-23x = -18-108
9x = -126
x= -126/9
x= -14