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Sagot :

Réponse :

Explications étape par étape

Bsr,

x

x+5

(x+5)*4 = 4x +20

4x+20 -11 = 4x +9

x= 9

4*9+9 = 45

x=-6

4*-6 +9 = -24 +9 = -15

x= 8/7

4*8/7 +9 = 32/7 +9 = 32/7 + 63/7 = 95/ 7

2) C'est D

3) 4x +9 =1

4x = 1-9 = -8

x = -8/4 = -2

x= -2

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