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hirondelle52

Bonjour;

1)

11 = x+5

11-5 = x

x = 6

2)

11 = 3x+2

11-2 =3x

9 = 3x

x = 9/3

x = 3

3)

3x+2 =x+5

3x-x = 5-2

2x = 3

x = 2/3

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