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Sagot :

Bonjour

•7-3,3x= 2x - 9,7

- 3,3x - 2x = - 9,7 - 7

- 5,3x = - 16,7

x = 16,7/5,3

•5,5x + 1,5= 9x + 9

5,5x - 9x = 9 - 1,5

- 3,5x = 7,5

x = - 7,5/3,5

• 11x +3 = 8x +7

11x - 8x = 7 - 3

3x = 4

x = 4/3

• 5+6x = x-9

6x - x = - 9 - 5

5x = - 14

x = - 14/5.

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