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Sagot :

VINS

bonjour

2 x + 7 = 15

2 x = 15 - 7

2 x = 8

x = 4

Bjr,

2x + 7 = 15

2x = 15 - 7

2x = 8

x = 8/2 = 4

- 3x - 3 = 18

- 3x = 18 + 3

- 3x = 21

x = -21/3 = -7

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