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Sagot :

bjr

3 x - 15 = 3

3x = 18

x = 6

2x + 6 = 0

2x = -6

x = -3

4x - 5 = 7x + 4

- 3x = 9

x = -3

-x - 1 = - 3

- x = -2

x = 2

7x - 21 = 0

7x = 21

x = 3

-3x = 0

x = 0

je te laisse terminer ce qui reste c'est la même chose

bonne journée

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