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Sagot :

MAUDMARINE

Bonsoir

Résous les équations suivantes :

7(2-x)=-2x

14 - 7x = - 2x

- 7x + 2x = - 14

- 5x = - 14

x = 14/5

6x=5(3+x)

6x = 15 + 5x

6x - 5x = 15

x = 15

5(1-x)=-2(x+2)

5 - 5x = - 2x - 4

- 5x + 2x = - 4 - 5

- 3x = - 9

x = 9/3

x = 3

-3(1+2x)=7(x-5)

- 3 - 6x = 7x - 35

- 6x - 7x = - 35 + 3

- 42x = - 32

x = 32/42

C = 16/21.

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