bonjour
8x - 7 = 9
8x - 7 + 7 = 9 + 7
8x = 16
8x / 8 = 16/8
x = 2
10x + 1 = 27
10x + 1 - 1 = 27 - 6
10x = 21
10x/10 = 21/10
x= 2,1
8x - 9 = 3x + 56
8x - 9 + 9 = 3x + 56 + 9
8x = 3x + 65
8x - 3x = 3x - 3x + 65
5x = 65
5x/5x = 65/5
x = 13
plus rapide
8x + 4 = 4x + 28
8x - 4x = 28 - 4
4x = 24
x = 6
10x + 3 = 6x + 7
4x = 4
x = 1
10x + 4 = 2x + 108
8x = 104
x = 13
11x + 1 = 2x + 100
9x = 99
x = 11
9x - 1 = 2x + 13
7x = 14
x = 2
6x - 12 = 5x - 10
x = 2
2x - 13 = x - 10
3x = 3
x = 1
...
Bonjour,
8x-3x = 56+9
5x = 65
x= 65/5
x= 13
10x-6x = 7-3
4x = 4
x= 4/4
x=1
11x-2x = 100-1
9x = 99
x = 99/9
x= 11
6x-5x= -10+12
x = 2
12x-2x = 67+3
10x = 70
x = 70/10
x= 7
8x-4x = 28 -4
4x = 24
x = 24/4
x= 6
10x-2x = 108 -4
8x = 104
x= 104/8
x=13
9x-2x = 13+1
7x = 14
x= 14/7
x= 2
2x-x = -10 +13
x = 3
12x -2x = 18 +12
10x = 30
x = 30/10
x = 3