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Sagot :

AGNESEMERAUD

Réponse :

2x+4 -x=13

2x-x=13-4

x=9

5( x - 2) = 7 x

10 x -10 = 7 x

10 x -7 x =10

3 x = 10

x = 10/3

3( 5 x+2) +1 = x

15 x +6 +1 = x

7= x - 15 x

7 = - 14 x   ou 14 x = -7

x= -7/14

x= -1/2

Explications étape par étape

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