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Sagot :

1) 3x - 5x = 2 + 4
-2x = 6
-2x/-2 = 6/-2
x = -3

2) -4x = 5-9
-4x = -4
-4x/-4 = -4/-4
x = -1

3) -3x - 2x = 3+6
-5x = 9
-5x/5 = 9/-5
x = 9/-5

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