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Sagot :

ISAPAUL

Bonjour

1-x+7(3-x) = 0

1-x+21-7x = 0

-8x+22=0

-8x=-22

x=-22/-8 =11/4

FABRICE

1 - x + 7(3-x) = 0

1 - x + 21 - 7x = 0

22 - 8x = 0

-8x = -22

8x = 22

x = 22/8

x = 11/4

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