bonjour
x + 7 = 2 x + 4
x - 2 x = 4 - 7
- x = - 3
x = 3
x - 1 = - 8 x + 1
x + 8 x = 1 + 1
9 x = 2
x = 2/9
2 x + 4 = 4 x - 5
2 x - 4 x = - 5 - 4
- 2 x = - 9
x = 9 /2
3 x - 9 = 2 + 9 x
3 x - 9 x = 2 + 9
- 6 x = 11
x = - 11 /6
continue
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4 x - 7 = 53
4 x = 53 + 7
4 x = 60
x = 15
3 ( x + 10 ) = 5 x
3 x + 30 = 5 x
3 x - 5 x = - 30
- 2 x = - 30
x = 15
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12 x = 1020
x = 85
85 livres vendus
99 + 2 x = 127
2 x = 127 - 99
2 x = 28
x = 14
T shirt = 14 €
5 x = 3 x + 18
5 x - 3 x = 18
2 x = 18
x = 9
Bd = 9 €
x + 2 x = 24
3 x = 24
x = 8
8 + 16 = 24
