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973LAURA973
Answered

Bonjour
Quelqu'un pourrait m'aider svp?
Résoudre ces équations.

12 − 7x + 3 = −5x + 9

−2x − 11 = −3x + 13

−7x + 9 = −2 + 9x

10x + 6 = −9x + 20

Sagot :

Bonsoir,

12 − 7x + 3 = −5x + 9

12+3 -9 = -5x +7x

6 = 2x

x= 6/2 = 3

−2x − 11 = −3x + 13

-2x+3x =13 +11

x = 24

−7x + 9 = −2 + 9x

9+2 = 9x+7x

11 = 16x

x= 11/16

10x + 6 = −9x + 20

10+9x = 20 -6

19x = 14

x= 14/19

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