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Sagot :

Réponse :

Bsr,

Explications étape par étape

70x +100 =-8+8x +9

70x -8x = -8 +9 -100

62x = -99

x-99/62

-8+8x +9 =10 -x

8x+x = 10 +8 -9

9x = 9

x = 9/9 = 1

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TELEPHONE16

Réponse :

Bonsoir

Explications étape par étape

10 ( 7x +10) = -8 - (-8x -9)

70x +100  =-8 +8x +9

70x -8x = -100 -8 +9

62x = -99

x = -99/62

-8 - (-8x -9) = 10 -x

-8 +8x +9 = 10 -x

8x +x  = -9 +8 +10

9x = 9

x = 9/9 = 1

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