bonjour pouvez vous m aidez svp merci d avance il faut résoudre les équations suivantes a l aide des phrases ( la lettre fois correspond a la lettre x ) 1) 2 x

Bonsoir,

1) 2 x - 4 =5 x - 37
2x - 5x = - 37 + 4
- 3x = - 33
x = 33/3
x = 11

2)5 x + 12 = 2 x + 18
5x - 2x = 18 - 12
3x = 6
x = 6/3
x = 2

3) -3 x + 5 = 12 x - 205
- 3x - 12x = - 205 - 5
- 15x = - 210
x = 210/15
x = 14

4) 9 x - 6 = 8 x - 13
9x - 8x = - 13 + 6
x = - 7

5) 11 x - 1 = 2 x - 10
11x - 2x = - 10 + 1
9x = - 9
x = - 9/9
x = - 1

6) 2 x + 2 = 12 x - 98
2x - 12x = - 98 - 2
- 10x = - 100
x = 100/10
x = 10

7) 7 x + 4 = 6 x + 4
7x - 6x = 4 - 4
x = 0

8) 10 x - 2 = 128 
10x = 128 + 2
10x = 130
x = 130/10
x = 13

9) - 3 x +2 = 13 x +50
- 3x - 13x = 50 - 2
- 16x = 48
x = - 48/16
x = - 3

10) 4 x +12 = 2 x +20
4x - 2x = 20 - 12
2x = 8
x = 8/2
x = 4