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Sagot :

MAUDMARINE

Bonjour

1/2 + 4= 5-6/7x

- 6/7x = 1/2 + 4 - 5

- 6/7x = 1/2 - 1

- 6/7x = 1/2 - 2/2

- 6/7x = - 1/2

- 12/14x = - 7/14

- 12x = - 7

x = 7/12

(x-7)²= (x+4)²

x² - 14x + 49 = x² + 8x + 16

x² - x² - 14x - 8x = 16 - 49

- 22x = - 33

x = 33/22

x = 3/2.

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